Furnace Troubleshooting - Top 10 Furnace Problems

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Language: en

00:00:00.030
so we all know there are a ton of
00:00:02.270 00:00:02.280 different kinds of furnace problems but
00:00:04.220 00:00:04.230 there's got to be some problems that are
00:00:06.079 00:00:06.089 more frequent than others and we will be
00:00:07.909 00:00:07.919 going over those common offenders coming
00:00:10.009 00:00:10.019 up
00:00:17.920 00:00:17.930 [Music]
00:00:23.730 00:00:23.740 [Applause]
00:00:31.210 00:00:31.220 00:00:37.470 00:00:37.480 hey guys J here with word of advice TV
00:00:40.180 00:00:40.190 for those of you that don't know I work
00:00:42.310 00:00:42.320 on appliances for a living and a lot of
00:00:43.840 00:00:43.850 that is furnace and air conditioning and
00:00:45.670 00:00:45.680 I've gotten to a habit of every house I
00:00:47.920 00:00:47.930 go to I write down you know what address
00:00:50.470 00:00:50.480 I've been to the time I got there the
00:00:53.590 00:00:53.600 date and briefly what I did at that
00:00:56.050 00:00:56.060 house
00:00:56.680 00:00:56.690 so what I did with my records here is I
00:00:59.770 00:00:59.780 went over 2017 winter and I marked all
00:01:03.310 00:01:03.320 my furnace calls with these red dots
00:01:05.740 00:01:05.750 that you see right here I work on more
00:01:08.320 00:01:08.330 than just furnaces dryers water heaters
00:01:10.060 00:01:10.070 and such
00:01:10.660 00:01:10.670 that's why not all of them are furnaces
00:01:12.700 00:01:12.710 but all the red dots are furnaces I got
00:01:16.180 00:01:16.190 two two books of Records here and this
00:01:18.640 00:01:18.650 is partially covering the winter of 2016
00:01:22.359 00:01:22.369 just basically from February to March so
00:01:27.030 00:01:27.040 kind of like a winter and a half of
00:01:29.890 00:01:29.900 Records so I counted up all my furnace
00:01:32.830 00:01:32.840 calls that I had and I tallied them up
00:01:36.310 00:01:36.320 and I came out to a total of 315 furnace
00:01:40.690 00:01:40.700 calls that I did and about one winter
00:01:43.450 00:01:43.460 season and maybe a couple months added
00:01:45.280 00:01:45.290 to that so a total of 315 and then I
00:01:48.520 00:01:48.530 went over and I categorized each one of
00:01:50.890 00:01:50.900 the problems that I encountered to come
00:01:53.110 00:01:53.120 up with a total of 51 different problems
00:01:57.310 00:01:57.320 that I had during that time so then I
00:02:00.070 00:02:00.080 went ahead and I tallied up how much
00:02:01.930 00:02:01.940 times I encountered the certain problem
00:02:03.880 00:02:03.890 and I came up with my list of top ten
00:02:06.040 00:02:06.050 problems which you see right here in two
00:02:08.020 00:02:08.030 circles so without further delay let's
00:02:10.750 00:02:10.760 just dig right in and go over these top
00:02:12.580 00:02:12.590 ten offenders so the number one furnace
00:02:15.160 00:02:15.170 call there is and this is seriously the
00:02:17.259 00:02:17.269 reigning champion this guy's always in
00:02:19.240 00:02:19.250 first place in first place is a dirty
00:02:21.940 00:02:21.950 flame sensor so out of a total of 315
00:02:25.300 00:02:25.310 calls 56 of those were a dirty flame
00:02:28.210 00:02:28.220 sensor which nearly doubles second place
00:02:30.670 00:02:30.680 and just so we know what I'm talking
00:02:32.890 00:02:32.900 about
00:02:33.370 00:02:33.380 let's take a quick look at my flame
00:02:35.620 00:02:35.630 sensor so when I come across a dirty
00:02:38.289 00:02:38.299 flame sensor I usually come to
00:02:39.699 00:02:39.709 somebody's house and their complaint is
00:02:41.590 00:02:41.600 it seems like my furnace is working
00:02:43.660 00:02:43.670 I can hear it turn on in fact I can even
00:02:45.490 00:02:45.500 hear my burners coming on but they only
00:02:47.740 00:02:47.750 stay on for a few seconds on they shot
00:02:49.420 00:02:49.430 right
00:02:49.800 00:02:49.810 and that's what I know that almost
00:02:52.720 00:02:52.730 guaranteed what they're experiencing is
00:02:54.370 00:02:54.380 a dirty flame sensor and all that is is
00:02:56.920 00:02:56.930 a stainless steel rod which will be
00:02:59.500 00:02:59.510 behind the burners if you look at your
00:03:01.420 00:03:01.430 burners usually you can see from the top
00:03:05.140 00:03:05.150 where the flame sensor is or if you look
00:03:06.729 00:03:06.739 from the bottom here's the igniter
00:03:09.220 00:03:09.230 usually we'll have two wires going to it
00:03:11.380 00:03:11.390 on the opposite side of the igniter if
00:03:14.140 00:03:14.150 you look across the burners on the other
00:03:16.509 00:03:16.519 side is usually where the flame sensor
00:03:18.400 00:03:18.410 will be not all flame sensors are as
00:03:20.979 00:03:20.989 easy to access as mine but many of them
00:03:23.710 00:03:23.720 are pretty accessible so you can take it
00:03:26.530 00:03:26.540 out make sure you turn it off your
00:03:28.660 00:03:28.670 furnace power switch I turned off mine
00:03:30.550 00:03:30.560 previously and this is your flame sensor
00:03:34.090 00:03:34.100 and this gets dirty with time and once
00:03:36.490 00:03:36.500 there's enough build-up on it your
00:03:38.050 00:03:38.060 furnace will stop sensing the flame and
00:03:40.330 00:03:40.340 all you need to clean this flame sensor
00:03:41.920 00:03:41.930 is a scotch brite pad you don't want to
00:03:44.559 00:03:44.569 use sandpaper on it dollar bills work
00:03:46.720 00:03:46.730 very well - or whatever currency you
00:03:49.090 00:03:49.100 have in your wallet so for example I got
00:03:53.830 00:03:53.840 a 50 so if you have bigger current so
00:03:57.340 00:03:57.350 you definitely want to be careful not to
00:03:59.110 00:03:59.120 rip it and stuff but just grab your
00:04:01.240 00:04:01.250 flame sensor and press hard on it and go
00:04:07.210 00:04:07.220 ahead and rub it I don't know why but
00:04:11.110 00:04:11.120 apparently currency clean these flame
00:04:13.539 00:04:13.549 sensors very well I generally prefer to
00:04:16.000 00:04:16.010 use scotch brite pads actually so you
00:04:20.590 00:04:20.600 shine that thing up and your furnace
00:04:23.710 00:04:23.720 problem will be resolved and the scotch
00:04:25.420 00:04:25.430 brite pads that I'm talking about they
00:04:27.700 00:04:27.710 look like this pretty much dishwashing
00:04:30.279 00:04:30.289 scrubby's you grab it the same way hold
00:04:33.610 00:04:33.620 it really tight and shine it up but
00:04:37.659 00:04:37.669 honestly once in a while I get calls
00:04:39.850 00:04:39.860 where I forget my tool bag at home I go
00:04:41.650 00:04:41.660 out there and if it's a flame sensor in
00:04:43.600 00:04:43.610 a pinch I've cleaned flame sensors
00:04:45.790 00:04:45.800 before with just the sleeve of my
00:04:47.350 00:04:47.360 sweater and that works just as well
00:04:49.690 00:04:49.700 might not last as long but it gets the
00:04:51.580 00:04:51.590 job done but anyways I'm not gonna get
00:04:53.469 00:04:53.479 stuck on the flame sensor for too long I
00:04:55.150 00:04:55.160 have two big videos that dive deeper
00:04:57.909 00:04:57.919 into this whole flame sensor issue so if
00:05:00.070 00:05:00.080 you want to know more about the flame
00:05:01.390 00:05:01.400 sensor how it works and all that stuff
00:05:02.950 00:05:02.960 do
00:05:03.580 00:05:03.590 go ahead and check out those videos but
00:05:05.200 00:05:05.210 anyways this is the number one offender
00:05:07.090 00:05:07.100 for furnace calls and there's some
00:05:08.920 00:05:08.930 rumors going around that if you clean
00:05:10.420 00:05:10.430 your flame sensor with a hundred dollar
00:05:12.160 00:05:12.170 bill it'll last a hundred times longer I
00:05:14.260 00:05:14.270 haven't tried that myself so I don't
00:05:15.700 00:05:15.710 know but believe it if you may anyways
00:05:18.100 00:05:18.110 moving on number two with 26 calls out
00:05:22.600 00:05:22.610 of 315 a dirty furnace filter and your
00:05:26.650 00:05:26.660 filter is generally gonna be on your
00:05:30.370 00:05:30.380 return duct most people have it l-shaped
00:05:34.180 00:05:34.190 like I do right here and your filter
00:05:36.100 00:05:36.110 will be in the return duct right before
00:05:37.750 00:05:37.760 the furnace and just so you know your
00:05:40.330 00:05:40.340 filters are directional most of them
00:05:43.060 00:05:43.070 will have an arrow on them right here
00:05:45.820 00:05:45.830 that says which which way the air flows
00:05:48.610 00:05:48.620 is the way you should put the filter in
00:05:50.350 00:05:50.360 whatever side has a net on it see how
00:05:53.410 00:05:53.420 this side doesn't have a net that wire
00:05:55.210 00:05:55.220 net but this side does that's the site
00:05:57.940 00:05:57.950 that goes towards the blower fan or
00:05:59.890 00:05:59.900 towards the furnace and the reason for
00:06:02.920 00:06:02.930 that is if for some reason somebody
00:06:05.200 00:06:05.210 doesn't replace their filter for a long
00:06:06.850 00:06:06.860 time it'll get really restricted and the
00:06:08.680 00:06:08.690 fan will start to suck it in and I've
00:06:10.660 00:06:10.670 seen that a couple times where the
00:06:11.860 00:06:11.870 filter gets completely sucked in and
00:06:13.570 00:06:13.580 wrapped around the motor shaft it's
00:06:15.880 00:06:15.890 really hard to pry it off that's why one
00:06:18.100 00:06:18.110 side of the filter has a net on it to
00:06:19.990 00:06:20.000 prevent it from being sucked in so if
00:06:21.880 00:06:21.890 you're like me and you forget to change
00:06:23.710 00:06:23.720 your filter a lot what I started doing
00:06:26.350 00:06:26.360 is just ordering my filters on Amazon I
00:06:28.810 00:06:28.820 get a whole box of them I put the old
00:06:31.420 00:06:31.430 ones right back into the box so after I
00:06:34.180 00:06:34.190 use the filter you should be changing
00:06:35.740 00:06:35.750 them really every month or two and
00:06:38.340 00:06:38.350 having a box standing by your furnace
00:06:40.570 00:06:40.580 kind of reminds you makes it easier to
00:06:42.340 00:06:42.350 just swap them out and one last thing
00:06:44.110 00:06:44.120 about the filters I promise this is the
00:06:45.700 00:06:45.710 last thing I'm getting stuck on filters
00:06:47.140 00:06:47.150 for a little too long here the best
00:06:49.450 00:06:49.460 filters to buy the ones we generally
00:06:51.340 00:06:51.350 recommend the fiberglass ones that are
00:06:53.170 00:06:53.180 either blue or green you know you can
00:06:54.970 00:06:54.980 see through them kinda those tend to let
00:06:57.190 00:06:57.200 too much through then there's these
00:06:58.900 00:06:58.910 premium filters where Gordian is just
00:07:01.120 00:07:01.130 closely knit together they tend to be a
00:07:04.630 00:07:04.640 little too restrictive and I have
00:07:06.280 00:07:06.290 checked air pressure before of all the
00:07:08.290 00:07:08.300 different filters and that really is
00:07:09.760 00:07:09.770 true so the one we recommend is this
00:07:12.430 00:07:12.440 medium grade pleated filter where the
00:07:14.110 00:07:14.120 accordion is a little more spaced out
00:07:15.490 00:07:15.500 these tend to catch them
00:07:17.440 00:07:17.450 stuff and they're not as restrictive so
00:07:20.320 00:07:20.330 I come to a customer's house and the
00:07:22.270 00:07:22.280 general complaint would be my furnace
00:07:24.490 00:07:24.500 seems to not be keeping up or I can see
00:07:27.820 00:07:27.830 the burners come on for a couple minutes
00:07:29.350 00:07:29.360 and turn off or maybe you know when it's
00:07:31.570 00:07:31.580 colder outside my furnace isn't keeping
00:07:33.400 00:07:33.410 up and generally that'll be because it's
00:07:35.530 00:07:35.540 overheating and the furnace if you look
00:07:37.840 00:07:37.850 right here has a high limit which
00:07:40.660 00:07:40.670 generally will look like this sometimes
00:07:42.880 00:07:42.890 it'll be a smaller switch but usually
00:07:45.190 00:07:45.200 it's a big rectangle looking thing like
00:07:47.080 00:07:47.090 that with two wires going to it that's a
00:07:49.450 00:07:49.460 high limit and basically if the furnace
00:07:51.580 00:07:51.590 inside is getting too hot because
00:07:53.650 00:07:53.660 there's not enough air going through it
00:07:55.270 00:07:55.280 then that high limit trips and it turns
00:07:58.030 00:07:58.040 the burners off leaves the fan on cools
00:08:00.610 00:08:00.620 itself off and then turns back on and
00:08:02.890 00:08:02.900 repeats that cycle over and over and
00:08:04.570 00:08:04.580 some furnaces have a lockout feature if
00:08:06.940 00:08:06.950 it overheats three to five times in one
00:08:09.940 00:08:09.950 heating cycle it'll go into a lockout
00:08:12.220 00:08:12.230 for three hours or it'll just sit there
00:08:13.870 00:08:13.880 and do nothing and then it'll restart
00:08:15.850 00:08:15.860 and try again all right moving on to
00:08:18.280 00:08:18.290 number three number three was a bad
00:08:20.710 00:08:20.720 inducer motor so out of 315 calls 24
00:08:23.470 00:08:23.480 were abandoned deucer motor and what
00:08:26.110 00:08:26.120 that will look like many times the
00:08:27.910 00:08:27.920 furnace isn't working at all you come
00:08:29.620 00:08:29.630 down you take off the furnace door and
00:08:31.150 00:08:31.160 if you put your hand on the inducer
00:08:32.770 00:08:32.780 motor a lot of times it'll be scorching
00:08:35.110 00:08:35.120 hot you like burn your hand you have to
00:08:37.210 00:08:37.220 let go right away or there are times
00:08:39.310 00:08:39.320 when it's not hot in those cases you
00:08:41.590 00:08:41.600 want to check with your meter and see if
00:08:43.390 00:08:43.400 it's actually getting 120 volts from the
00:08:45.280 00:08:45.290 control board because sometimes it's
00:08:46.960 00:08:46.970 actually the board that's bad and not
00:08:48.430 00:08:48.440 the inducer motor where it's just not
00:08:50.530 00:08:50.540 sending power to it but long story short
00:08:52.720 00:08:52.730 if the inducer motor is getting a
00:08:54.850 00:08:54.860 hundred twenty volts but it's not
00:08:56.260 00:08:56.270 turning on the inducer motor is bad
00:08:58.780 00:08:58.790 the only other scenario is if your motor
00:09:01.000 00:09:01.010 has something stuck in it like a bird or
00:09:03.190 00:09:03.200 a mouse or a bat or some bird nest or
00:09:06.130 00:09:06.140 something like that and an easy way to
00:09:07.990 00:09:08.000 check that is sometimes you'll have a
00:09:09.970 00:09:09.980 cooling fan in front of your inducer
00:09:11.770 00:09:11.780 motor or you have like in my case I do
00:09:15.010 00:09:15.020 see my fan it's gonna be hard to see on
00:09:17.260 00:09:17.270 the camera but there's a fan behind
00:09:19.300 00:09:19.310 these grates you can try to stick like a
00:09:21.520 00:09:21.530 little screwdriver in there and spin it
00:09:22.990 00:09:23.000 and see if it's bent if it's spinning
00:09:25.630 00:09:25.640 freely or rather freely I should say
00:09:27.700 00:09:27.710 that means you probably don't have
00:09:29.380 00:09:29.390 anything in there or anything stuck in
00:09:31.480 00:09:31.490 and your inducer motor is just bad and
00:09:34.329 00:09:34.339 of course the easy fix for that is to
00:09:37.090 00:09:37.100 just replace the whole inducer motor
00:09:38.470 00:09:38.480 usually they come as a little assembly
00:09:40.359 00:09:40.369 which makes them pretty easy to replace
00:09:42.069 00:09:42.079 moving on to fourth place and fourth
00:09:44.049 00:09:44.059 place was a bad blower motor with 23
00:09:46.989 00:09:46.999 calls and the blower motor is down here
00:09:49.739 00:09:49.749 and up full furnace the blower motor is
00:09:52.989 00:09:52.999 usually on the bottom section of the
00:09:54.850 00:09:54.860 furnace and that's this thing right here
00:09:56.710 00:09:56.720 this is the blower motor housing and if
00:09:59.049 00:09:59.059 you reach in there's the blower motor
00:10:01.359 00:10:01.369 there's the capacitor and right below it
00:10:03.699 00:10:03.709 right here every blower motor will have
00:10:05.439 00:10:05.449 a capacitor just that thing right there
00:10:08.579 00:10:08.589 and if you reach in on the other side
00:10:11.619 00:10:11.629 generally you can put your hand in there
00:10:13.900 00:10:13.910 and spin the blower wheel or the
00:10:17.079 00:10:17.089 squirrel cage by ham now if the blower
00:10:19.720 00:10:19.730 motor is bad or seizing up you won't be
00:10:22.269 00:10:22.279 able to freely spin that fan you'll feel
00:10:25.030 00:10:25.040 that it's seized up where it's hard to
00:10:27.009 00:10:27.019 spend another indicator is if you reach
00:10:28.989 00:10:28.999 in there and touch that motor
00:10:30.340 00:10:30.350 it'll be really hot most of the time and
00:10:32.530 00:10:32.540 why those fail is a because your filter
00:10:36.819 00:10:36.829 was dirty for a long time maybe there
00:10:38.439 00:10:38.449 was just some kind of electrical surge
00:10:39.639 00:10:39.649 many times the capacitor is dead that
00:10:42.789 00:10:42.799 little capacitor that I pointed to
00:10:44.169 00:10:44.179 earlier that kind of gives the fan of
00:10:46.569 00:10:46.579 boost to get it spinning if that thing's
00:10:48.429 00:10:48.439 completely dead your fan will have a
00:10:49.960 00:10:49.970 really hard time turning on so generally
00:10:52.090 00:10:52.100 I'll come to a house and the customer
00:10:53.470 00:10:53.480 will tell me either the fan starts very
00:10:56.350 00:10:56.360 sluggishly
00:10:57.160 00:10:57.170 and then completely quits or they say
00:11:00.100 00:11:00.110 they're smelling some kind of a burnt
00:11:01.809 00:11:01.819 electrical smell in the house then
00:11:03.879 00:11:03.889 almost guarantee that that blower motor
00:11:05.710 00:11:05.720 is bad sometimes the whole wheel will be
00:11:08.739 00:11:08.749 messed up to where it'll be just
00:11:10.569 00:11:10.579 scraping the sides of that housing and
00:11:12.730 00:11:12.740 of course the remedy for that is to
00:11:14.559 00:11:14.569 replace the blower motor if the wheels
00:11:16.539 00:11:16.549 bad replace the wheel and you always
00:11:18.400 00:11:18.410 replace the capacitor as well and if
00:11:20.470 00:11:20.480 that's the problem you're experiencing
00:11:21.879 00:11:21.889 at your house I do have a video where I
00:11:24.069 00:11:24.079 replaced my motor and I filmed the whole
00:11:25.900 00:11:25.910 thing so if you need to help with
00:11:27.220 00:11:27.230 replacing your blower motor do check
00:11:29.439 00:11:29.449 that video out and coming in at fifth
00:11:31.449 00:11:31.459 place is a bad control board and the
00:11:34.419 00:11:34.429 control board is generally going to be
00:11:36.329 00:11:36.339 right in front of the blower housing my
00:11:39.249 00:11:39.259 control board is right here they look
00:11:41.679 00:11:41.689 differently on various furnaces older
00:11:43.990 00:11:44.000 furnaces will not have control boards
00:11:45.610 00:11:45.620 they'll just have a few relays but most
00:11:47.710 00:11:47.720 furnaces will have a board that looks
00:11:49.390 00:11:49.400 similar to this and once in a while they
00:11:51.910 00:11:51.920 will be up in the top section but
00:11:54.640 00:11:54.650 generally they're here and what happens
00:11:56.710 00:11:56.720 is you know customer will call us and
00:11:58.360 00:11:58.370 tell us hey either my furnace is not
00:11:59.890 00:11:59.900 working at all or just doing something
00:12:01.390 00:12:01.400 weird like the fan will not turn off no
00:12:04.360 00:12:04.370 matter what I do I would have to turn
00:12:06.190 00:12:06.200 the whole furnace switch off just to
00:12:07.780 00:12:07.790 turn the blower fan off just constantly
00:12:09.820 00:12:09.830 running sometimes it'll do something
00:12:12.010 00:12:12.020 weird like turn on the a/c as it's
00:12:13.990 00:12:14.000 running the furnace or is simply not
00:12:16.000 00:12:16.010 sending power to something and a lot of
00:12:17.890 00:12:17.900 times when you take the board off and
00:12:19.240 00:12:19.250 look on the other side of it you'll see
00:12:20.950 00:12:20.960 some burn marks on it and of course
00:12:22.570 00:12:22.580 that's a dead giveaway that the board is
00:12:24.400 00:12:24.410 bad and I also have a video on how to
00:12:26.590 00:12:26.600 troubleshoot a control board as well so
00:12:28.660 00:12:28.670 if you think your problem is the control
00:12:30.250 00:12:30.260 board you can go ahead and check that
00:12:31.750 00:12:31.760 video out and that way we won't have to
00:12:33.760 00:12:33.770 spend any more time on the control board
00:12:35.620 00:12:35.630 and coming in in sixth place
00:12:37.240 00:12:37.250 with 15 calls each we have a two-way tie
00:12:39.760 00:12:39.770 the first one is a bad gas valve the gas
00:12:42.850 00:12:42.860 valve is right here generally it will be
00:12:44.740 00:12:44.750 in the upper section of the furnace
00:12:46.120 00:12:46.130 above the burners sometimes it'll be
00:12:48.190 00:12:48.200 below but basically if your gas valve is
00:12:51.520 00:12:51.530 getting power yeah it's not opening then
00:12:53.890 00:12:53.900 that just means that the solenoid on the
00:12:55.870 00:12:55.880 gas valve is bad and generally you can't
00:12:58.030 00:12:58.040 just replace the coil on it you have to
00:13:00.040 00:13:00.050 replace the whole gas valve and what
00:13:01.870 00:13:01.880 that would look like is the furnace will
00:13:03.940 00:13:03.950 start up normally where you're inducer
00:13:06.250 00:13:06.260 motor will start your pressure switches
00:13:07.810 00:13:07.820 will close you'll see your igniter
00:13:09.550 00:13:09.560 glowing and that's it nothing else
00:13:12.340 00:13:12.350 happens it just glows and then shuts off
00:13:14.680 00:13:14.690 and I have seen thank you for where
00:13:16.390 00:13:16.400 customers will accidentally turn off the
00:13:18.700 00:13:18.710 gas to the furnace and they thought
00:13:21.100 00:13:21.110 they're turning it off to something else
00:13:22.750 00:13:22.760 like a water heater or maybe a garage
00:13:24.460 00:13:24.470 heater they turn it off and that will
00:13:26.590 00:13:26.600 give you similar results where you know
00:13:28.930 00:13:28.940 the igniter will glow but in that
00:13:30.579 00:13:30.589 instance you actually hear the gas film
00:13:32.860 00:13:32.870 opening it'll be like a click click but
00:13:35.470 00:13:35.480 no gas comes out in that case your
00:13:37.900 00:13:37.910 furnace is simply just not getting gas
00:13:39.670 00:13:39.680 so if you're experiencing that problem
00:13:41.470 00:13:41.480 then yes you just need to replace the
00:13:43.450 00:13:43.460 whole gas valve and the other one in 6th
00:13:45.579 00:13:45.589 place is a bad heat exchanger now when I
00:13:48.400 00:13:48.410 say bad heat exchanger I'm talking about
00:13:49.870 00:13:49.880 both the primary heat exchanger which is
00:13:52.270 00:13:52.280 behind all of this or behind the wall of
00:13:55.180 00:13:55.190 the furnace here that's the main
00:13:56.530 00:13:56.540 component of the fern
00:13:57.500 00:13:57.510 and high-efficiency furnaces an easy way
00:14:00.560 00:14:00.570 to tell if you have a high-efficiency
00:14:01.430 00:14:01.440 furnace is if you have PVC venting so if
00:14:04.220 00:14:04.230 you have plastic pipes coming out of
00:14:05.990 00:14:06.000 your furnace instead of a steel one like
00:14:08.060 00:14:08.070 mine that means you have a
00:14:09.950 00:14:09.960 high-efficiency furnace mine is not
00:14:12.050 00:14:12.060 high-efficiency it's just an 80% furnace
00:14:13.970 00:14:13.980 so it has just one heat exchanger the
00:14:16.220 00:14:16.230 primary heat exchanger and those high
00:14:17.900 00:14:17.910 efficiencies they have - they have the
00:14:19.430 00:14:19.440 primary and the secondary which creates
00:14:21.740 00:14:21.750 water or condensation so what is a heat
00:14:24.320 00:14:24.330 exchanger and why is it so important the
00:14:26.570 00:14:26.580 heat exchanger is the main component of
00:14:28.310 00:14:28.320 the furnace and that is basically the
00:14:30.530 00:14:30.540 thing that separates your house air from
00:14:32.840 00:14:32.850 the combustion fumes that are going out
00:14:34.340 00:14:34.350 your chimney usually it's a tubular
00:14:36.530 00:14:36.540 looking thing it kind of snakes back and
00:14:38.870 00:14:38.880 forth they do it that way so that the
00:14:40.940 00:14:40.950 heat stays in there longer so it's not
00:14:43.280 00:14:43.290 just going straight up and out that way
00:14:45.050 00:14:45.060 you're losing a lot of efficiency or
00:14:46.880 00:14:46.890 sometimes it'll be split up into cells
00:14:48.770 00:14:48.780 and those cells are tubes with time they
00:14:52.070 00:14:52.080 will crack and although they are
00:14:53.990 00:14:54.000 designed to last as long as the average
00:14:55.700 00:14:55.710 life of the furnace which is about 15
00:14:57.770 00:14:57.780 years there are circumstances that can
00:15:00.140 00:15:00.150 kill them a lot faster so for example
00:15:02.360 00:15:02.370 that dirty filter that we talked about
00:15:04.430 00:15:04.440 earlier if your furnace is constantly
00:15:06.260 00:15:06.270 overheating that will kill your heat
00:15:08.750 00:15:08.760 exchanger a lot faster or a plug day
00:15:11.270 00:15:11.280 coil or bad ductwork or maybe your
00:15:13.910 00:15:13.920 furnace was installed poorly to begin
00:15:15.590 00:15:15.600 with that can all decrease the lifetime
00:15:17.450 00:15:17.460 of a furnace I've condemned furnaces
00:15:19.310 00:15:19.320 before that were only six or eight years
00:15:21.170 00:15:21.180 old so what this would look like a lot
00:15:22.820 00:15:22.830 of times the customer will call us
00:15:24.170 00:15:24.180 because the furnace is simply not
00:15:26.540 00:15:26.550 working or something's not right or
00:15:28.850 00:15:28.860 something smells outside by the exhaust
00:15:31.190 00:15:31.200 fumes differently a lot of times I'll
00:15:33.440 00:15:33.450 come and I'll see that flame rollout
00:15:35.750 00:15:35.760 switches which in my case are right here
00:15:37.910 00:15:37.920 and different furnaces are in different
00:15:39.740 00:15:39.750 spots but these flame roll-ups are
00:15:41.870 00:15:41.880 manual reset switches they have a little
00:15:44.870 00:15:44.880 button on them if you're a flame rollout
00:15:47.480 00:15:47.490 switch is tripped that means that your
00:15:51.400 00:15:51.410 burner chamber right here was getting
00:15:53.420 00:15:53.430 too hot or sometimes the flames
00:15:55.640 00:15:55.650 literally roll out backwards and you can
00:15:57.710 00:15:57.720 see them just coming back out and that's
00:16:00.230 00:16:00.240 what these switches are here for if it's
00:16:02.060 00:16:02.070 getting too hot they will trip and one
00:16:04.010 00:16:04.020 way we can tell if the heat exchanger is
00:16:05.570 00:16:05.580 bad or not is by putting a combustion
00:16:09.080 00:16:09.090 analyzer probe into the chip
00:16:10.810 00:16:10.820 or into your exhaust pipe and seeing how
00:16:13.810 00:16:13.820 much carbon monoxide is going out your
00:16:15.460 00:16:15.470 chimney it should be generally under a
00:16:17.920 00:16:17.930 hundred parts per million and a normally
00:16:19.690 00:16:19.700 operating furnace generally if you have
00:16:21.970 00:16:21.980 a bad furnace or a bad heat exchanger
00:16:24.310 00:16:24.320 your carbon monoxide parts-per-million
00:16:26.170 00:16:26.180 will go through the roof they'll be like
00:16:28.030 00:16:28.040 2,000 3,000 4,000 and then you want to
00:16:30.880 00:16:30.890 pull out your probe right away otherwise
00:16:32.410 00:16:32.420 it'll peg your meter if the carbon
00:16:34.450 00:16:34.460 monoxide going out the chimney is that
00:16:35.980 00:16:35.990 high then generally you are having a
00:16:38.470 00:16:38.480 problem with your heat exchanger and
00:16:39.850 00:16:39.860 then if we want to visually verify if
00:16:42.280 00:16:42.290 it's bad or not sometimes you can pull
00:16:44.050 00:16:44.060 the blower motor out if you have about
00:16:45.880 00:16:45.890 80% furnace you can pull the whole thing
00:16:47.770 00:16:47.780 out get under there and look at it from
00:16:50.320 00:16:50.330 the bottom where you see the whole heat
00:16:52.090 00:16:52.100 exchanger and try to find a crack or to
00:16:54.580 00:16:54.590 see where it's cracked that way
00:16:56.170 00:16:56.180 or you can take out that high limit and
00:16:58.060 00:16:58.070 if you have a inspection camera or
00:17:00.070 00:17:00.080 endoscope for your phone you can also
00:17:02.410 00:17:02.420 snake in there and try to see where the
00:17:04.150 00:17:04.160 cracks are long story short the American
00:17:06.700 00:17:06.710 Gas Association states that by code if
00:17:09.790 00:17:09.800 there is a crack or a hole in your heat
00:17:12.070 00:17:12.080 exchanger the heat exchanger or the
00:17:14.350 00:17:14.360 whole furnace must be replaced and the
00:17:16.780 00:17:16.790 reason that's so important is because
00:17:18.210 00:17:18.220 the heat exchanger is the thing that
00:17:20.260 00:17:20.270 keeps all the combustion fumes out of
00:17:22.390 00:17:22.400 your house supply air so if that thing
00:17:24.280 00:17:24.290 has a crack or a hole in it and it's
00:17:25.600 00:17:25.610 producing that much carbon monoxide and
00:17:27.610 00:17:27.620 somehow that carbon monoxide leaks out
00:17:29.740 00:17:29.750 into your air supply especially at night
00:17:31.720 00:17:31.730 when everybody's sleeping it will only
00:17:33.760 00:17:33.770 take minutes to kill everybody in the
00:17:35.530 00:17:35.540 house including the dog but anyway
00:17:37.570 00:17:37.580 enough about the heat exchanger moving
00:17:39.220 00:17:39.230 on in seventh place we also have a
00:17:41.050 00:17:41.060 two-way tie with 11 calls each the first
00:17:43.840 00:17:43.850 one is a bad igniter their igniter is
00:17:46.450 00:17:46.460 right here in mine it's on the right
00:17:50.110 00:17:50.120 side usually I'll have a plug like this
00:17:52.780 00:17:52.790 a little molex plug that you can unplug
00:17:55.540 00:17:55.550 what that would look like is the
00:17:57.910 00:17:57.920 customer says the furnace turns on it
00:18:00.160 00:18:00.170 seems to start working but it never
00:18:02.140 00:18:02.150 actually lights so I come down to the
00:18:04.150 00:18:04.160 basement
00:18:04.570 00:18:04.580 I turned the furnace switch off turn it
00:18:06.670 00:18:06.680 back on and I see what it does so you'll
00:18:09.700 00:18:09.710 see the inducer motor come on after a
00:18:11.800 00:18:11.810 while generally you will hear the gas
00:18:13.600 00:18:13.610 valve open and a little bit of gas will
00:18:15.910 00:18:15.920 come out but the igniter was never
00:18:17.950 00:18:17.960 glowing most of the time that means your
00:18:20.410 00:18:20.420 igniter is bad and if you want to check
00:18:22.240 00:18:22.250 it with the meter you can put your leads
00:18:24.810 00:18:24.820 into the plug in the metal parts one
00:18:28.230 00:18:28.240 lead-in here and one leading here if the
00:18:30.930 00:18:30.940 igniter is getting a hundred twenty
00:18:32.460 00:18:32.470 volts but it's not glowing then you know
00:18:34.710 00:18:34.720 you have a bad igniter or you can turn
00:18:36.480 00:18:36.490 the power off to your furnace unplug
00:18:39.060 00:18:39.070 your igniter and then set your meter to
00:18:40.950 00:18:40.960 resistance and put both leads into both
00:18:43.320 00:18:43.330 plugs and if you have o L that means the
00:18:46.530 00:18:46.540 igniter is bad as well and once you
00:18:48.540 00:18:48.550 replace it your furnace should fire
00:18:50.070 00:18:50.080 right back up and the other one in seven
00:18:52.020 00:18:52.030 place with eleven calls is a plugged a
00:18:54.600 00:18:54.610 coil so it'll be a similar scenario
00:18:56.670 00:18:56.680 where the furnace is overheating and
00:18:58.320 00:18:58.330 tripping on that high limit and the a
00:19:01.050 00:19:01.060 coil or the evaporator coil as part of
00:19:03.000 00:19:03.010 the air conditioner and if you have an
00:19:04.680 00:19:04.690 up flow furnace generally it'll be
00:19:06.720 00:19:06.730 sitting on top of your furnace and
00:19:08.970 00:19:08.980 you'll see these refrigerant i p-- scum
00:19:10.440 00:19:10.450 into it along with the drain line on the
00:19:13.290 00:19:13.300 bottom here and this coil it looks like
00:19:16.920 00:19:16.930 a radiator almost like the unit you have
00:19:19.050 00:19:19.060 standing outside your air conditioner
00:19:20.940 00:19:20.950 you know how it gets plugged up with
00:19:22.050 00:19:22.060 time as a sucking air on the sides so
00:19:24.510 00:19:24.520 same thing happens with that one after a
00:19:26.250 00:19:26.260 while especially if you're not very good
00:19:28.050 00:19:28.060 at changing your furnace filters or if
00:19:30.450 00:19:30.460 you have a filter that lets a lot
00:19:32.040 00:19:32.050 through after a while all the dust and
00:19:34.650 00:19:34.660 debris that gets past the filter will
00:19:36.750 00:19:36.760 settle on to underside of that a coil
00:19:39.030 00:19:39.040 and plug it up causing a restriction in
00:19:41.160 00:19:41.170 the air flow so a lot of heat starts to
00:19:43.140 00:19:43.150 build up in here because it can't get
00:19:44.610 00:19:44.620 out and that of course will trip your
00:19:46.620 00:19:46.630 high limit once it gets too hot the
00:19:48.270 00:19:48.280 company I work for we don't do a coil
00:19:50.610 00:19:50.620 cleaning unless they're very easy to
00:19:52.260 00:19:52.270 access a lot of them aren't very easily
00:19:54.360 00:19:54.370 accessible so we just recommend that
00:19:56.820 00:19:56.830 people hire some duct cleaners to come
00:19:59.250 00:19:59.260 out and clean that underside of their a
00:20:00.840 00:20:00.850 coil but it is possible to clean it
00:20:02.850 00:20:02.860 yourself just search on youtube how to
00:20:04.890 00:20:04.900 clean your evaporator coil or a coil and
00:20:07.500 00:20:07.510 I'm sure you'll find some videos of
00:20:09.420 00:20:09.430 people cleaning their a coils and you'll
00:20:11.520 00:20:11.530 see what that entails and moving on in
00:20:14.100 00:20:14.110 eighth place with nine calls we have a
00:20:17.370 00:20:17.380 bad ignition module and a bad ignition
00:20:20.130 00:20:20.140 module is basically a control board but
00:20:23.130 00:20:23.140 the difference between a control board
00:20:24.390 00:20:24.400 like this and an ignition module or
00:20:26.760 00:20:26.770 ignition control is that the ignition
00:20:29.580 00:20:29.590 module is only for the ignition so it
00:20:31.980 00:20:31.990 only controls the gas valve the spark if
00:20:34.290 00:20:34.300 you have a spark igniter and the flame
00:20:36.270 00:20:36.280 sensor
00:20:36.930 00:20:36.940 whereas this control board it can
00:20:38.580 00:20:38.590 trolls both the gas part and the fan
00:20:40.950 00:20:40.960 which is why sometimes it's called the
00:20:42.720 00:20:42.730 IFC which stands for integrated furnace
00:20:45.180 00:20:45.190 control but anyway is that ignition
00:20:46.980 00:20:46.990 module a lot of times I'll come out and
00:20:48.899 00:20:48.909 what it'll be doing is if it's a spark
00:20:51.600 00:20:51.610 igniter for some reason it won't be
00:20:53.430 00:20:53.440 sending the spark to the igniter or
00:20:55.320 00:20:55.330 maybe it's not sending power to the gas
00:20:57.539 00:20:57.549 valve and of course to check that you
00:20:59.700 00:20:59.710 would have to test it with your meter I
00:21:01.470 00:21:01.480 don't have an ignition module in my
00:21:02.820 00:21:02.830 furnace so I can't show you but
00:21:04.470 00:21:04.480 basically you would just check with your
00:21:06.240 00:21:06.250 meter to see if it's sending power to
00:21:07.830 00:21:07.840 the gas valve or if it's sending power
00:21:09.690 00:21:09.700 to the spark and if it's not the
00:21:11.580 00:21:11.590 Magnusson module is bad and needs to be
00:21:13.320 00:21:13.330 replaced and in 9th place we have a
00:21:15.299 00:21:15.309 two-way tie with eight orders each the
00:21:18.180 00:21:18.190 first one is a bad thermostat and a lot
00:21:20.070 00:21:20.080 of times what that will look like is on
00:21:22.380 00:21:22.390 a thermostat you know you turn on your
00:21:23.610 00:21:23.620 heat or your furnace or even your fan
00:21:25.620 00:21:25.630 and nothing happens or maybe just one of
00:21:27.810 00:21:27.820 them is not working yet if you take the
00:21:29.639 00:21:29.649 thermostat off the wall and jumper r2w
00:21:32.159 00:21:32.169 which is basically jump ring the heat
00:21:34.320 00:21:34.330 call then the furnace turns on and
00:21:36.210 00:21:36.220 everything works good in that case you
00:21:38.159 00:21:38.169 know that just the thermostat is bad and
00:21:39.930 00:21:39.940 nothing's wrong with the furnace itself
00:21:41.399 00:21:41.409 and in my furnace playlist I have two
00:21:43.470 00:21:43.480 videos on how to bypass the thermostat
00:21:45.510 00:21:45.520 just for that reason to see if it's bad
00:21:47.549 00:21:47.559 or not I have a video of how to bypass
00:21:49.560 00:21:49.570 the thermostat at the thermostat itself
00:21:51.419 00:21:51.429 and then I have a video of how to bypass
00:21:53.130 00:21:53.140 the thermostat at the control board so
00:21:55.769 00:21:55.779 if you think your thermostat is bad you
00:21:57.330 00:21:57.340 can check out those videos and go from
00:21:58.860 00:21:58.870 there and the other one in 9th place is
00:22:00.690 00:22:00.700 a dirty pilot assembly and of course I
00:22:03.659 00:22:03.669 don't have this on my furnace because
00:22:04.950 00:22:04.960 mine is a hot surface igniter but what
00:22:07.380 00:22:07.390 that is is intermittent pilot system
00:22:10.019 00:22:10.029 it'll have a little pilot hood a spark
00:22:13.710 00:22:13.720 igniter generally and a flame sensor so
00:22:17.549 00:22:17.559 what happens is it'll have a silver tube
00:22:19.529 00:22:19.539 coming out of the gas valve which is the
00:22:21.120 00:22:21.130 pilot tube that pilot tube opens up
00:22:24.120 00:22:24.130 first let sound gas into the pilot to
00:22:27.060 00:22:27.070 light that pilot intermittently or
00:22:28.799 00:22:28.809 basically when there's a call for heat
00:22:30.659 00:22:30.669 so that little pilot lights and once the
00:22:33.149 00:22:33.159 flame sensor proves that there's a
00:22:34.500 00:22:34.510 little flame there then that will tell
00:22:37.230 00:22:37.240 the gas valve to open up and light all
00:22:39.299 00:22:39.309 the burners and what happens is that
00:22:41.430 00:22:41.440 little pilot tube that goes to the pilot
00:22:43.980 00:22:43.990 hood there's a little orifice in there
00:22:45.779 00:22:45.789 which is really tiny
00:22:47.370 00:22:47.380 that little orphis if there's some gunk
00:22:49.529 00:22:49.539 that falls on it maybe some scaling or
00:22:51.630 00:22:51.640 some
00:22:52.110 00:22:52.120 or dust or any kind of debris that
00:22:54.360 00:22:54.370 little hole is very small if some stuff
00:22:56.700 00:22:56.710 falls on that little pilot orifice that
00:22:58.950 00:22:58.960 will plug it up and your pilot flame
00:23:01.409 00:23:01.419 will not be hitting that flame sensor as
00:23:03.510 00:23:03.520 well as it should be or maybe your pilot
00:23:05.549 00:23:05.559 will be really lazy looking the pilot
00:23:08.580 00:23:08.590 usually is basically two sharp flames if
00:23:11.820 00:23:11.830 you see your pilot just going straight
00:23:13.350 00:23:13.360 up that means something's going on and
00:23:15.720 00:23:15.730 most likely that pilot orifice is dirty
00:23:17.760 00:23:17.770 so all you got to do is take that whole
00:23:20.460 00:23:20.470 thing out sometimes you can get away
00:23:22.620 00:23:22.630 with just taking it out from the bottom
00:23:24.149 00:23:24.159 and then being careful and how you bend
00:23:26.370 00:23:26.380 that tube so you don't kink it just get
00:23:28.740 00:23:28.750 it out far enough where you can take
00:23:30.000 00:23:30.010 apart that pilot assembly to get to that
00:23:32.310 00:23:32.320 orifice other times you have to take off
00:23:34.440 00:23:34.450 the knot here and here just take the
00:23:36.090 00:23:36.100 whole thing out and get to the orifice
00:23:37.919 00:23:37.929 and clean it out I generally use just a
00:23:41.220 00:23:41.230 little piece of my bass brass brush just
00:23:44.010 00:23:44.020 one hair to get into that little orifice
00:23:46.980 00:23:46.990 and clean it up and then you put
00:23:48.419 00:23:48.429 everything back together and everything
00:23:49.950 00:23:49.960 works once again and last but not least
00:23:52.440 00:23:52.450 in 10th place coming in with seven calls
00:23:54.750 00:23:54.760 we have a plugged condensate trap and a
00:23:57.630 00:23:57.640 lot of times that will be a carrier with
00:23:59.820 00:23:59.830 that white trap but there are other ones
00:24:02.399 00:24:02.409 that get plugged up as well
00:24:03.899 00:24:03.909 so if you have a carrier or a Bryant
00:24:06.029 00:24:06.039 furnace and you see a white trap on it
00:24:08.279 00:24:08.289 in those cases your furnace will be
00:24:09.990 00:24:10.000 blinking a pressure code error if you
00:24:12.389 00:24:12.399 take off the thick hose from that trap
00:24:14.990 00:24:15.000 if that's the problem you're having
00:24:17.190 00:24:17.200 generally there will be a ton of water
00:24:19.019 00:24:19.029 that comes out of that hose so if you
00:24:21.240 00:24:21.250 take that hose off and a lot of water
00:24:22.500 00:24:22.510 comes rushing out that means your trap
00:24:24.600 00:24:24.610 is probably plugged up so unhook all the
00:24:27.269 00:24:27.279 hoses and the one from the bottom as
00:24:29.250 00:24:29.260 well take that trap out and then flush
00:24:31.409 00:24:31.419 it with hot water and close all the
00:24:33.450 00:24:33.460 holes and just shake it vigorously flush
00:24:36.360 00:24:36.370 it out fill it up again shake it
00:24:38.639 00:24:38.649 vigorously until you can pour water into
00:24:41.310 00:24:41.320 each of the holes on top the three holes
00:24:43.169 00:24:43.179 and see water coming out the other end
00:24:44.760 00:24:44.770 but once you clean that kind of a trap
00:24:46.740 00:24:46.750 up real good that will take care of your
00:24:48.779 00:24:48.789 pressure switch problem which is caused
00:24:50.310 00:24:50.320 by that plugged up condensate trap which
00:24:53.190 00:24:53.200 is causing water to back up in your
00:24:54.659 00:24:54.669 collector box and your pressure switch
00:24:56.639 00:24:56.649 hole is generally hooks up right to that
00:24:58.289 00:24:58.299 collector box so if it senses that
00:25:00.120 00:25:00.130 there's water in there it'll shut the
00:25:02.279 00:25:02.289 furnace off
00:25:04.130 00:25:04.140 and unfortunately all good things come
00:25:06.590 00:25:06.600 to an end that was all for my top ten
00:25:09.200 00:25:09.210 furnace problems but that was only about
00:25:11.690 00:25:11.700 a third of all the stuff that I wrote
00:25:13.250 00:25:13.260 down so let's not let all my efforts go
00:25:15.890 00:25:15.900 to waste and go through the rest of the
00:25:18.320 00:25:18.330 list as honorable mentions coming in
00:25:21.020 00:25:21.030 with six calls as a high limit that's
00:25:22.640 00:25:22.650 stuck open and what that would look like
00:25:24.470 00:25:24.480 is I'll come to somebody's house and
00:25:26.150 00:25:26.160 their blower fan is just constantly on
00:25:28.700 00:25:28.710 and nothing else works a lot of times
00:25:31.220 00:25:31.230 the the control board will be blinking
00:25:33.290 00:25:33.300 an error code as well that will say
00:25:35.330 00:25:35.340 circuit lockout or limit lockout and
00:25:37.370 00:25:37.380 what happens sometimes is if you have a
00:25:39.080 00:25:39.090 dirty filter for a while and your limit
00:25:41.150 00:25:41.160 keeps tripping over and over and over
00:25:42.770 00:25:42.780 again that limit switch it's made out of
00:25:44.960 00:25:44.970 two different metals and when they heat
00:25:46.880 00:25:46.890 up one of them warps and disconnects
00:25:48.800 00:25:48.810 which interrupts the circuit and if that
00:25:50.960 00:25:50.970 keeps happening over and over and over
00:25:52.430 00:25:52.440 again sometimes that's which will get
00:25:54.020 00:25:54.030 stuck open and what you can do which
00:25:56.240 00:25:56.250 almost works every time is take a
00:25:58.190 00:25:58.200 screwdriver or a nut driver and just
00:26:00.590 00:26:00.600 give your high limit switch just a good
00:26:02.960 00:26:02.970 few knocks and a lot of times that will
00:26:06.230 00:26:06.240 be enough to free it up if that doesn't
00:26:08.090 00:26:08.100 free it up you can try to take the
00:26:09.260 00:26:09.270 screws out take the limit out and just
00:26:11.420 00:26:11.430 knock it against the cabinet or the
00:26:12.860 00:26:12.870 floor and that should free it up if
00:26:14.960 00:26:14.970 nothing frees it up well then you just
00:26:17.030 00:26:17.040 have to replace the limit and if you
00:26:18.470 00:26:18.480 want to check your limit with a
00:26:19.760 00:26:19.770 voltmeter as your furnace is running you
00:26:21.950 00:26:21.960 can put both leads on both terminals on
00:26:24.260 00:26:24.270 the limit and you should have zero volts
00:26:26.720 00:26:26.730 if the switch is closed if you have 27
00:26:29.420 00:26:29.430 volts that means the switch is open and
00:26:31.280 00:26:31.290 coming in with five calls we have a bad
00:26:33.200 00:26:33.210 pressure switch I have two of them in
00:26:35.210 00:26:35.220 mine and sometimes once again similar to
00:26:37.730 00:26:37.740 the high limit the pressure switches can
00:26:39.800 00:26:39.810 get stuck in either a closed or an open
00:26:41.990 00:26:42.000 position and if it's stuck in any of
00:26:43.940 00:26:43.950 those positions your furnace will not
00:26:45.470 00:26:45.480 work
00:26:45.950 00:26:45.960 unfortunately taking these things off
00:26:47.630 00:26:47.640 and hitting them you will not do you any
00:26:49.400 00:26:49.410 good
00:26:49.760 00:26:49.770 you could try to take the little
00:26:51.320 00:26:51.330 pressure switch hose off and gently blow
00:26:53.930 00:26:53.940 through it or suck on it to try to
00:26:55.820 00:26:55.830 exercise that diaphragm and if it's
00:26:57.830 00:26:57.840 stuck sometimes it will free it up and
00:26:59.690 00:26:59.700 if that works for you great if not well
00:27:02.150 00:27:02.160 then you just have to replace that
00:27:03.260 00:27:03.270 pressure switch
00:27:04.280 00:27:04.290 I had three calls of a damaged or noisy
00:27:06.680 00:27:06.690 blower wheel and those calls the blower
00:27:09.020 00:27:09.030 motor would still be working but it'll
00:27:11.060 00:27:11.070 just be making a lot of racket either
00:27:12.800 00:27:12.810 the blower wheel was out of balance or
00:27:14.780 00:27:14.790 some of the fins were broken off so it
00:27:16.670 00:27:16.680 was just a scrape
00:27:17.660 00:27:17.670 against the sides of it just making a
00:27:19.190 00:27:19.200 lot of noise in that case I usually
00:27:21.320 00:27:21.330 replace the blower motor and the wheel
00:27:23.270 00:27:23.280 and the capacitor just the whole set to
00:27:25.640 00:27:25.650 get a done work I had one call where I
00:27:27.680 00:27:27.690 had a bad 3 wire pilot some older
00:27:30.260 00:27:30.270 furnaces have those where instead of a
00:27:31.880 00:27:31.890 flame sensor it'll just be like a big
00:27:33.410 00:27:33.420 bar not a lot of them out there left but
00:27:36.140 00:27:36.150 on a three wire pilot it's not a flame
00:27:38.210 00:27:38.220 sensor that you can clean so if it's not
00:27:40.100 00:27:40.110 sensing the flame for some reason then
00:27:41.660 00:27:41.670 you just have to replace that whole
00:27:42.800 00:27:42.810 assembly
00:27:43.610 00:27:43.620 I had to blowing three amp fuses which
00:27:46.160 00:27:46.170 is generally going to be on your control
00:27:47.540 00:27:47.550 board somewhere or in my case it's just
00:27:50.330 00:27:50.340 on these two wires in series with the
00:27:52.310 00:27:52.320 secondary side of the transformer and as
00:27:54.530 00:27:54.540 far as I can remember one of those was a
00:27:56.120 00:27:56.130 barre thermostat wire I think it was
00:27:58.010 00:27:58.020 either too har or 2w and it was touching
00:28:00.350 00:28:00.360 the door of the furnace and I was
00:28:02.150 00:28:02.160 shorting it out and for the other one I
00:28:04.070 00:28:04.080 remember replacing the fuse and I
00:28:05.630 00:28:05.640 couldn't find anything wrong so I just
00:28:07.520 00:28:07.530 ran the furnace for like 20 minutes and
00:28:09.140 00:28:09.150 it was working great I called it a day
00:28:10.760 00:28:10.770 told the guy to call me if anything else
00:28:12.320 00:28:12.330 comes up but anyways if your three apt
00:28:14.210 00:28:14.220 fuse is popping while you're running
00:28:16.430 00:28:16.440 your furnace the first thing you want to
00:28:18.080 00:28:18.090 do is look for any bear 24 volt wires or
00:28:21.380 00:28:21.390 basically the thermostat wires I also
00:28:23.630 00:28:23.640 had one call where the furnace breaker
00:28:25.190 00:28:25.200 was tripped and I couldn't figure out
00:28:26.510 00:28:26.520 why
00:28:27.080 00:28:27.090 once again I reset the breaker I checked
00:28:29.090 00:28:29.100 everything all the amp drawers
00:28:30.440 00:28:30.450 there's no bare wires found nothing
00:28:32.360 00:28:32.370 wrong once again ran the furnace for
00:28:34.280 00:28:34.290 like 20 minutes and everything was
00:28:35.840 00:28:35.850 working great so I was thinking maybe
00:28:37.730 00:28:37.740 something was wrong with the breaker
00:28:39.020 00:28:39.030 itself because the furnace I wasn't
00:28:41.360 00:28:41.370 finding anything but anyways reset that
00:28:43.160 00:28:43.170 breaker and it's been working I never
00:28:45.230 00:28:45.240 got called back to that one and coming
00:28:46.730 00:28:46.740 in with three calls
00:28:47.780 00:28:47.790 I had a leaking collector box my furnace
00:28:50.510 00:28:50.520 doesn't even have a collector box only
00:28:52.340 00:28:52.350 high efficiency furnaces will have a
00:28:53.990 00:28:54.000 collector box once again the high
00:28:56.300 00:28:56.310 efficiency furnace is the one with the
00:28:57.680 00:28:57.690 PVC venting the two plastic pipes coming
00:29:00.170 00:29:00.180 out generally two sometimes it'll be
00:29:01.760 00:29:01.770 just one but on high efficiency furnaces
00:29:04.880 00:29:04.890 behind your inducer motor there's also
00:29:07.040 00:29:07.050 going to be a collector box so if water
00:29:09.530 00:29:09.540 for some reason is backing up in your
00:29:11.330 00:29:11.340 condensate line the water that's backing
00:29:14.120 00:29:14.130 up will go into that collector box until
00:29:15.800 00:29:15.810 it trips a pressure switch because the
00:29:18.080 00:29:18.090 pressure switch is connected to the
00:29:19.310 00:29:19.320 collector box so if the water level gets
00:29:21.110 00:29:21.120 up to the level where the pressure
00:29:23.060 00:29:23.070 switch hose connects that will shut off
00:29:25.130 00:29:25.140 your furnace but anyways I had three of
00:29:27.200 00:29:27.210 those boxes that were leaking and
00:29:28.820 00:29:28.830 there's not much it could do for that
00:29:30.680 00:29:30.690 you could
00:29:31.280 00:29:31.290 try to silicone it that doesn't work too
00:29:33.290 00:29:33.300 well the recommended fix for that is to
00:29:35.450 00:29:35.460 just replace that collector box I had
00:29:37.460 00:29:37.470 for calls where the customer told me hey
00:29:39.140 00:29:39.150 my furnace is not working at all
00:29:40.790 00:29:40.800 I come out to that house and all it is
00:29:42.440 00:29:42.450 is just dead thermostat batteries so I
00:29:45.320 00:29:45.330 replaced the batteries and everything
00:29:46.580 00:29:46.590 fires right back up
00:29:47.960 00:29:47.970 I had one gas valve that was leaking
00:29:49.700 00:29:49.710 through which means that for some reason
00:29:52.280 00:29:52.290 when the heat call would be over the gas
00:29:54.290 00:29:54.300 valve wouldn't close all the way and
00:29:55.910 00:29:55.920 there would be some gas still coming
00:29:57.710 00:29:57.720 through and there's really nothing you
00:29:59.270 00:29:59.280 could do for that except just replace
00:30:01.220 00:30:01.230 the whole gas valve
00:30:02.270 00:30:02.280 I had one call that was a burnt rodent
00:30:04.460 00:30:04.470 smell so a customer called us because he
00:30:06.530 00:30:06.540 was smelling of burnt rodent smelled
00:30:07.910 00:30:07.920 that he thought was coming from the
00:30:09.050 00:30:09.060 furnace so I came out I checked
00:30:11.120 00:30:11.130 everything out you can check my carbon
00:30:13.040 00:30:13.050 monoxide readings in the flue checked my
00:30:15.380 00:30:15.390 amp drawers my motors checked the
00:30:17.540 00:30:17.550 ductwork all around the filter found
00:30:19.880 00:30:19.890 nothing wrong I told the guy hey your
00:30:21.650 00:30:21.660 furnace is working great this smell is
00:30:23.870 00:30:23.880 not coming from the furnace or the
00:30:25.490 00:30:25.500 ductwork and I just so happened to come
00:30:27.560 00:30:27.570 back to that house for a dryer maybe
00:30:29.690 00:30:29.700 like four months later and I asked him
00:30:31.580 00:30:31.590 hey is your furnace still smelling like
00:30:33.080 00:30:33.090 a rodent and he told me no actually you
00:30:35.720 00:30:35.730 know what like a month after you left I
00:30:38.200 00:30:38.210 actually happened to come down to my
00:30:40.310 00:30:40.320 basement and I was lucky that I came
00:30:42.050 00:30:42.060 down there at that time I saw my
00:30:43.760 00:30:43.770 electrical outlet in that room starting
00:30:46.970 00:30:46.980 to smolder and melt and smoke luckily he
00:30:49.970 00:30:49.980 was there when that was happening so he
00:30:51.470 00:30:51.480 was able to just shut off his breaker to
00:30:53.270 00:30:53.280 that room and get an electrician out
00:30:54.980 00:30:54.990 there and get that whole outlet replaced
00:30:56.900 00:30:56.910 but that was kind of interesting that
00:30:58.490 00:30:58.500 Bert rodent smell was actually coming
00:31:00.920 00:31:00.930 from his electrical outlet frying itself
00:31:03.860 00:31:03.870 I had one call where too many vents were
00:31:05.900 00:31:05.910 closed off so the customer had just two
00:31:08.300 00:31:08.310 floors and he had more events on his
00:31:10.850 00:31:10.860 basement floor than he did in his upper
00:31:12.590 00:31:12.600 floor and he closed them all off and
00:31:14.540 00:31:14.550 that was just too much vents closed off
00:31:16.370 00:31:16.380 and his furnace started to overheat so I
00:31:18.530 00:31:18.540 told him to open all of them back up and
00:31:20.270 00:31:20.280 his supply temperature coming out the
00:31:22.010 00:31:22.020 furnace dropped drastically after he
00:31:23.990 00:31:24.000 opened up all the vents I had two calls
00:31:26.030 00:31:26.040 where the customer would call and say
00:31:27.410 00:31:27.420 hey my furnace is leaking up a storm
00:31:29.630 00:31:29.640 there's a big puddle underneath it I
00:31:31.220 00:31:31.230 would come out and the furnace is not
00:31:33.020 00:31:33.030 leaking at all in fact some of those
00:31:34.760 00:31:34.770 furnaces are 80% furnaces which don't
00:31:37.250 00:31:37.260 even create water so if you're running
00:31:38.960 00:31:38.970 your furnace there should be no water so
00:31:41.240 00:31:41.250 whenever I get a furnace call that
00:31:42.620 00:31:42.630 involves the furnace leaking water I all
00:31:44.870 00:31:44.880 look around the furnace like for example
00:31:46.940 00:31:46.950 I have a water heater right next to mine
00:31:48.500 00:31:48.510 I have a humidifier and those two calls
00:31:51.110 00:31:51.120 that I had both of them were a
00:31:53.150 00:31:53.160 humidifier that was leaking what
00:31:55.280 00:31:55.290 happened is they didn't replace their
00:31:56.690 00:31:56.700 water panel filter inside their
00:31:58.280 00:31:58.290 humidifier for a long time and
00:32:00.140 00:32:00.150 eventually that water panel just gets
00:32:02.270 00:32:02.280 really brittle and soggy and it just
00:32:04.370 00:32:04.380 kind of flops down and if water is
00:32:06.350 00:32:06.360 pouring out if you have your humidifier
00:32:07.790 00:32:07.800 on it just runs down your return duct it
00:32:11.690 00:32:11.700 just starts to pull up pull up and
00:32:13.610 00:32:13.620 eventually you're gonna have water all
00:32:14.900 00:32:14.910 over the floor around your friends
00:32:16.370 00:32:16.380 I had one call where the burners the in
00:32:19.430 00:32:19.440 shot burners were so dirty that the
00:32:21.920 00:32:21.930 carbon monoxide readings I was getting
00:32:23.510 00:32:23.520 were like over 400 parts per million and
00:32:26.120 00:32:26.130 all I had to do is take all those in
00:32:27.950 00:32:27.960 shot burners out there was like a lot of
00:32:29.330 00:32:29.340 rust and buildup on it just brush them
00:32:31.700 00:32:31.710 all out real good I blew him out with
00:32:33.470 00:32:33.480 some compressed air put him back in and
00:32:35.510 00:32:35.520 that dropped it - if my memory doesn't
00:32:37.940 00:32:37.950 fail me I think it was like 45 which is
00:32:40.670 00:32:40.680 a pretty big change from 400 I had four
00:32:43.010 00:32:43.020 calls where there was a weak blower
00:32:45.110 00:32:45.120 motor capacitor the customer would say
00:32:47.300 00:32:47.310 whenever my blower motor starts it
00:32:49.280 00:32:49.290 starts off very sluggishly
00:32:51.320 00:32:51.330 so I checked the capacitor with my meter
00:32:52.970 00:32:52.980 and sure enough the capacitor is almost
00:32:54.890 00:32:54.900 dead so I replaced the capacitor and
00:32:56.750 00:32:56.760 everything is good to go but if the
00:32:58.130 00:32:58.140 capacitor is really weak or almost near
00:33:00.560 00:33:00.570 dead then you're better off just
00:33:02.240 00:33:02.250 replacing the motor as well but if you
00:33:04.220 00:33:04.230 want a temporary fix then replacing that
00:33:06.080 00:33:06.090 capacitor should do the trick I had one
00:33:08.300 00:33:08.310 call where two thermostat wire inside
00:33:10.280 00:33:10.290 the thermostat was bad and what that
00:33:13.010 00:33:13.020 looked like is you know nothing was
00:33:14.570 00:33:14.580 working
00:33:14.930 00:33:14.940 I took the thermostat off the wall all
00:33:16.730 00:33:16.740 the wires are connected right but when I
00:33:18.980 00:33:18.990 gently target on each wire the W wire
00:33:22.130 00:33:22.140 just kind of snapped right off so that
00:33:24.950 00:33:24.960 little copper part that goes under the
00:33:27.020 00:33:27.030 screw that was just broken right off and
00:33:29.150 00:33:29.160 that was interrupting the call for heat
00:33:30.890 00:33:30.900 so all I have to do is snip that part
00:33:32.750 00:33:32.760 off strip off another piece of wire put
00:33:34.910 00:33:34.920 it back in there and everything fired
00:33:36.260 00:33:36.270 right back up I had four calls where the
00:33:39.170 00:33:39.180 customers thought that his furnace
00:33:40.550 00:33:40.560 wasn't working but it actually was a
00:33:42.170 00:33:42.180 programmable thermostat that they didn't
00:33:44.060 00:33:44.070 know how to use so they would set a
00:33:45.890 00:33:45.900 temperature on their thermostat but the
00:33:47.720 00:33:47.730 program like every couple hours it'll
00:33:49.850 00:33:49.860 revert back to the programming and the
00:33:52.040 00:33:52.050 customer didn't know that there's a hole
00:33:53.630 00:33:53.640 but indeed press it it overrides the
00:33:55.730 00:33:55.740 program and they weren't aware that
00:33:57.470 00:33:57.480 there's a program in the back
00:33:58.910 00:33:58.920 so they'd be constantly battling their
00:34:00.800 00:34:00.810 thermostat and I'm thinking that their
00:34:02.390 00:34:02.400 furnace isn't keeping up because the
00:34:03.890 00:34:03.900 thermostat would automatically revert
00:34:05.450 00:34:05.460 back to the programming that's in the
00:34:07.160 00:34:07.170 background so those calls become a
00:34:08.660 00:34:08.670 little educational session I teach them
00:34:10.340 00:34:10.350 how the programming works and most
00:34:12.020 00:34:12.030 importantly I teach them about the whole
00:34:13.760 00:34:13.770 button so you set the temperature to
00:34:15.530 00:34:15.540 whatever you want you press hold and
00:34:16.880 00:34:16.890 that will override any programming
00:34:18.590 00:34:18.600 that's in the background and most people
00:34:20.270 00:34:20.280 like that hold option the most I had two
00:34:22.640 00:34:22.650 calls where the transformer was bad and
00:34:24.440 00:34:24.450 generally what will be bad is the
00:34:25.910 00:34:25.920 secondary side transformers they have
00:34:27.920 00:34:27.930 two sides they have the primary side
00:34:29.420 00:34:29.430 which is the 120 volt side and then you
00:34:31.730 00:34:31.740 got the secondary side which is your 24
00:34:33.590 00:34:33.600 volt side most of the time it's that 24
00:34:35.780 00:34:35.790 volt side that goes bad so if you
00:34:37.670 00:34:37.680 disconnect both wires from it and just
00:34:39.200 00:34:39.210 take a resistance reading or an ohm
00:34:41.420 00:34:41.430 reading of that secondary side if you
00:34:43.520 00:34:43.530 see o L that means that secondary side
00:34:45.680 00:34:45.690 of the transformer is bad and it needs
00:34:47.270 00:34:47.280 to be replaced
00:34:48.080 00:34:48.090 another easy way to check it is if you
00:34:50.390 00:34:50.400 have 120 volts going to the primary side
00:34:52.460 00:34:52.470 of the transformer you should be getting
00:34:54.320 00:34:54.330 24 volts on the other side as well so if
00:34:56.690 00:34:56.700 you set your meter to voltage and put
00:34:58.340 00:34:58.350 your meter leads on the secondary side
00:34:59.810 00:34:59.820 you should have 24 volts if your primary
00:35:02.000 00:35:02.010 side has 120 volts if you don't have 24
00:35:04.910 00:35:04.920 volts that means your transformer is bad
00:35:06.530 00:35:06.540 and should be replaced I had two calls
00:35:08.660 00:35:08.670 where the fan really was bad and this is
00:35:10.880 00:35:10.890 mostly just on older furnaces where
00:35:13.520 00:35:13.530 instead of a control board it'll have a
00:35:15.500 00:35:15.510 fan relay and those tend to get either
00:35:17.690 00:35:17.700 stuck open or stuck closed and it won't
00:35:19.970 00:35:19.980 turn on the fan or in the contrary
00:35:21.770 00:35:21.780 it'll always run the fan non-stop so you
00:35:23.990 00:35:24.000 just replace that fan relay and your
00:35:25.520 00:35:25.530 problem goes away
00:35:26.540 00:35:26.550 I had one call where the motor bracket
00:35:28.460 00:35:28.470 was loose so whenever the blower motor
00:35:30.620 00:35:30.630 would come on it would come on with a
00:35:31.850 00:35:31.860 really loud bang just boom and then I
00:35:34.400 00:35:34.410 would start and the reason that was
00:35:35.990 00:35:36.000 happening is the motor bracket that
00:35:38.150 00:35:38.160 holds that motor it was loosely on there
00:35:41.030 00:35:41.040 so whenever the motor would start the
00:35:42.680 00:35:42.690 torque from the motor would crank the
00:35:44.870 00:35:44.880 motor and it would just hit against the
00:35:46.640 00:35:46.650 bracket and that's what would make that
00:35:47.930 00:35:47.940 loud racket every time it started so I
00:35:49.940 00:35:49.950 took that bracket off I threw it away
00:35:51.230 00:35:51.240 and I put on the MB 55 motor bracket and
00:35:54.140 00:35:54.150 it worked like a champ no more noise I
00:35:56.060 00:35:56.070 only had one furnace call where the
00:35:57.920 00:35:57.930 power switch was just simply off I don't
00:36:00.560 00:36:00.570 know what happened maybe some kids were
00:36:02.210 00:36:02.220 playing and bumped it off or somebody
00:36:03.950 00:36:03.960 was replacing a furnace filter and
00:36:05.450 00:36:05.460 bumped it off well all I had to do was
00:36:07.190 00:36:07.200 turn that furnace power switch back on
00:36:08.690 00:36:08.700 and everything fired right back up I had
00:36:11.330 00:36:11.340 three calls for noise
00:36:12.570 00:36:12.580 fairness and one of those was the
00:36:14.820 00:36:14.830 sheetmetal piece that's on the bottom of
00:36:16.710 00:36:16.720 the furnace somehow they had come undone
00:36:18.870 00:36:18.880 and it was just making a noise every
00:36:21.270 00:36:21.280 time the blower motor is working because
00:36:22.800 00:36:22.810 of the suction so only one side was
00:36:25.140 00:36:25.150 undone so just sit there and kind of hit
00:36:28.050 00:36:28.060 against the cabinet of the furnace
00:36:29.520 00:36:29.530 making a rattling noise so all I had to
00:36:31.530 00:36:31.540 do was just secure that metal panel to
00:36:33.600 00:36:33.610 the cabinet of the furnace with the
00:36:34.830 00:36:34.840 screw and the noise went away I had
00:36:36.510 00:36:36.520 another one where two bore a motor for
00:36:38.100 00:36:38.110 some reason was noisy and I could not
00:36:39.600 00:36:39.610 figure out why but every time I would
00:36:41.550 00:36:41.560 stick my hand in and push the blower
00:36:43.140 00:36:43.150 motor housing up the noise would go away
00:36:45.330 00:36:45.340 so because I couldn't really figure out
00:36:47.490 00:36:47.500 why it's doing that
00:36:48.720 00:36:48.730 I just took a 2x4 and just jammed it
00:36:51.030 00:36:51.040 underneath the blower motor and that
00:36:52.560 00:36:52.570 solved the problem and the last noise
00:36:54.030 00:36:54.040 call I had was regarding the ductwork so
00:36:57.000 00:36:57.010 everything was working great but it was
00:36:58.320 00:36:58.330 rattling up a storm throughout the
00:37:00.300 00:37:00.310 ductwork and I found the spot the
00:37:02.670 00:37:02.680 culprit and somehow the slip joint or
00:37:05.250 00:37:05.260 the drive I should say got undone and it
00:37:07.680 00:37:07.690 was just rattling up a storm so all I
00:37:09.600 00:37:09.610 had to do is just push that thing back
00:37:11.280 00:37:11.290 together and the noise went away I had
00:37:13.380 00:37:13.390 two thermostat calls where the
00:37:15.060 00:37:15.070 thermostat was wired wrong and usually
00:37:17.190 00:37:17.200 that happens because the customer
00:37:18.900 00:37:18.910 replaces the thermostat and they forgot
00:37:20.910 00:37:20.920 to look at the wiring and how its wired
00:37:22.980 00:37:22.990 before they took the old wires off so
00:37:25.080 00:37:25.090 they put the new one back on and the
00:37:26.550 00:37:26.560 labels are a little different and
00:37:27.780 00:37:27.790 they're not sure where everything goes
00:37:29.040 00:37:29.050 so they do it through the best of their
00:37:30.780 00:37:30.790 memory and a day or two later I come out
00:37:33.270 00:37:33.280 to fix it I had one call where gas valve
00:37:36.600 00:37:36.610 was set to pilot this was on a really
00:37:38.550 00:37:38.560 old furnace the gas valve had three
00:37:40.710 00:37:40.720 positions - on/off and pilot it was
00:37:43.050 00:37:43.060 actually a standing pilot and I guess
00:37:45.090 00:37:45.100 during the summer the customer had
00:37:46.350 00:37:46.360 turned his gas valve to pilot and forgot
00:37:48.090 00:37:48.100 about it so all I had to do was just
00:37:49.770 00:37:49.780 come out there and turned a knob to the
00:37:51.450 00:37:51.460 on position and they fired right up and
00:37:53.220 00:37:53.230 everything worked great
00:37:54.090 00:37:54.100 I had one call where I had a bad spark
00:37:56.370 00:37:56.380 module it's just a little black box
00:37:58.020 00:37:58.030 where your spark igniter hooks up - and
00:38:00.270 00:38:00.280 that little black box was the one that
00:38:02.130 00:38:02.140 sends the spark so the box is bad
00:38:04.200 00:38:04.210 therefore no spark and nothing happens
00:38:06.420 00:38:06.430 so I replaced the spark module and it
00:38:08.310 00:38:08.320 fired right back up
00:38:09.270 00:38:09.280 I had one call where the flame rollout
00:38:10.920 00:38:10.930 switch was tripped so I reset it I
00:38:13.230 00:38:13.240 checked everything and I couldn't find
00:38:15.240 00:38:15.250 why that thing had tripped so I
00:38:17.340 00:38:17.350 double-checked everything again and once
00:38:19.020 00:38:19.030 again found nothing wrong so that one
00:38:20.730 00:38:20.740 was kind of interesting I had three
00:38:22.410 00:38:22.420 calls where the gas pressure was set to
00:38:24.150 00:38:24.160 high on the gas valve and
00:38:26.190 00:38:26.200 either set too high or not adjusted when
00:38:29.009 00:38:29.019 the furnace was installed originally or
00:38:30.809 00:38:30.819 maybe another service tech came out
00:38:32.339 00:38:32.349 previously and set the gas pressure too
00:38:34.710 00:38:34.720 high or if you don't have a regulator on
00:38:37.140 00:38:37.150 your gas piping it couldn't even be from
00:38:39.269 00:38:39.279 the gas company if their gas pressures
00:38:41.190 00:38:41.200 we're going up and down that could
00:38:42.779 00:38:42.789 affect your gas valve as well and just
00:38:44.970 00:38:44.980 throw off its pressures so all I have to
00:38:46.799 00:38:46.809 do on those calls is just adjust the gas
00:38:48.690 00:38:48.700 pressure it should be between three
00:38:50.490 00:38:50.500 point two and three point eight inches
00:38:52.380 00:38:52.390 of water column I usually set it at
00:38:54.150 00:38:54.160 about three point four I had three calls
00:38:56.250 00:38:56.260 where there was a spiderweb
00:38:57.420 00:38:57.430 inside of the gas valve corpus and those
00:39:00.480 00:39:00.490 particular calls are in mobile home
00:39:03.029 00:39:03.039 furnaces or in the trailer park
00:39:04.769 00:39:04.779 furnaces generally coleman's it'll be
00:39:07.710 00:39:07.720 just one gas valve with an orifice
00:39:09.240 00:39:09.250 inside of it with one big burner and
00:39:11.039 00:39:11.049 that orifice if you screw it apart
00:39:13.349 00:39:13.359 during the summer it seems like spiders
00:39:15.359 00:39:15.369 just love to make a web in there just a
00:39:17.700 00:39:17.710 complete web that covers up the whole
00:39:19.319 00:39:19.329 gas valve orifice so if you take a
00:39:21.000 00:39:21.010 wrench and take that morphers out you'll
00:39:23.099 00:39:23.109 see a bunch of stuff in there just clear
00:39:24.599 00:39:24.609 it all out put that orphis back on put
00:39:26.849 00:39:26.859 it all back together and the furnace
00:39:28.140 00:39:28.150 fires right back up I also had one call
00:39:30.240 00:39:30.250 where the orifice on the gas manifold
00:39:32.370 00:39:32.380 was plugged up also from a spider
00:39:34.200 00:39:34.210 there's four of them generally on
00:39:36.569 00:39:36.579 furnaces like this you'll have four
00:39:38.880 00:39:38.890 offices sometimes five or six depending
00:39:41.880 00:39:41.890 on how many burners you have but if you
00:39:43.710 00:39:43.720 take an inspection mirror and just stick
00:39:46.079 00:39:46.089 it in there and look at every single
00:39:47.609 00:39:47.619 orifice what was happening is all my
00:39:50.309 00:39:50.319 burners would light but my third burner
00:39:52.079 00:39:52.089 would not come on so I stuck an
00:39:54.210 00:39:54.220 inspection mirror in there and I saw
00:39:55.529 00:39:55.539 that the orifice was just covered with
00:39:58.049 00:39:58.059 white stuff which turned out to be a
00:39:59.789 00:39:59.799 spider web so in that case all I had to
00:40:01.829 00:40:01.839 do was just take a little piece of wire
00:40:03.299 00:40:03.309 I bent it and just pulled it in there
00:40:05.579 00:40:05.589 and just cleared that work force out
00:40:06.720 00:40:06.730 that way I didn't have to take out this
00:40:08.249 00:40:08.259 whole manifold to clean it I tested it
00:40:10.529 00:40:10.539 and it fired right back up
00:40:11.940 00:40:11.950 I had one call where I carry our inducer
00:40:14.339 00:40:14.349 motor there was a few model of carriers
00:40:16.410 00:40:16.420 where for some reason their pressure
00:40:18.569 00:40:18.579 switch ports on the carrier inducer
00:40:20.940 00:40:20.950 motor assembly was too small and purred
00:40:23.819 00:40:23.829 a manufacturer you actually had to drill
00:40:26.039 00:40:26.049 out that pressure switch port otherwise
00:40:28.380 00:40:28.390 your furnace would always have pressure
00:40:29.789 00:40:29.799 switch problems which was exactly what
00:40:31.740 00:40:31.750 was happening to me they kept having a
00:40:33.720 00:40:33.730 pressure switch problem and after I
00:40:35.279 00:40:35.289 drilled out that port and put the hose
00:40:36.779 00:40:36.789 back on that problem went away I had
00:40:39.089 00:40:39.099 three calls
00:40:39.750 00:40:39.760 the condensate trap was leaking
00:40:41.130 00:40:41.140 generally it'll be those carrier traps
00:40:43.080 00:40:43.090 sometimes they'll be the Lennox traps
00:40:44.880 00:40:44.890 where it'll be a black trap either
00:40:46.500 00:40:46.510 inside or on the side of the furnace and
00:40:48.420 00:40:48.430 once again of course this only applies
00:40:50.220 00:40:50.230 to high efficiency furnaces and the fix
00:40:52.440 00:40:52.450 for that is just replacing that trap
00:40:54.540 00:40:54.550 I had one call where the actual power
00:40:56.370 00:40:56.380 switch on the side of the furnace was
00:40:58.290 00:40:58.300 bad and once that switch got replaced
00:41:00.030 00:41:00.040 everything fired right back up
00:41:01.800 00:41:01.810 I had three calls where the furnace
00:41:03.480 00:41:03.490 blower speed was set to low for that
00:41:06.300 00:41:06.310 size of a furnace so all I had to do was
00:41:08.609 00:41:08.619 just increase the fan speed and
00:41:09.960 00:41:09.970 everything went back to normal
00:41:11.190 00:41:11.200 I had three calls where the condensate
00:41:12.930 00:41:12.940 line was leaking once again on high
00:41:14.609 00:41:14.619 efficiency furnaces I believe two of
00:41:16.590 00:41:16.600 them were PVC piping where I guess
00:41:18.870 00:41:18.880 somebody stepped on them and it cracked
00:41:20.220 00:41:20.230 and the fix for that is pretty simple
00:41:21.720 00:41:21.730 just replace that whole condensate drain
00:41:23.640 00:41:23.650 line if it's very long then just replace
00:41:25.920 00:41:25.930 that piece that is leaking I went on one
00:41:27.870 00:41:27.880 call where the customer said his furnace
00:41:29.490 00:41:29.500 was not working not doing anything and
00:41:31.560 00:41:31.570 all it was is his thermostat was just
00:41:33.660 00:41:33.670 simply turned off so they would adjust
00:41:36.150 00:41:36.160 the temperature but nothing was
00:41:37.260 00:41:37.270 happening nothing was turning on so all
00:41:39.030 00:41:39.040 I had to do on that call is literally
00:41:40.349 00:41:40.359 just turn it to heat and everything
00:41:41.730 00:41:41.740 00:41:42.990 00:41:43.000 I had one call where I had to relight a
00:41:44.940 00:41:44.950 standing pilot I guess a downdraft must
00:41:47.490 00:41:47.500 have put it out or something I reloaded
00:41:49.260 00:41:49.270 the thermocouple is good the pilot flame
00:41:51.270 00:41:51.280 looked nice everything worked great I
00:41:53.640 00:41:53.650 replaced three inducer control boards
00:41:55.920 00:41:55.930 and not very many furnaces habit I think
00:41:58.590 00:41:58.600 it's mainly carrier the older model of
00:42:00.599 00:42:00.609 carriers that have them where the
00:42:02.130 00:42:02.140 inducer motor will have its own little
00:42:03.660 00:42:03.670 control board and those tend to go bad
00:42:06.090 00:42:06.100 so it replaced three of those I had
00:42:08.130 00:42:08.140 three bird nests in the intake this
00:42:10.830 00:42:10.840 mostly applies to the high efficiency
00:42:12.570 00:42:12.580 furnaces with the PVC vent and intake
00:42:14.849 00:42:14.859 for some reason birds just love making
00:42:16.859 00:42:16.869 nests inside of those intake pipes so I
00:42:19.290 00:42:19.300 just cleared out those nests and the
00:42:20.760 00:42:20.770 furnace fired right back up and finally
00:42:23.070 00:42:23.080 the last one I'm starting to lose my
00:42:25.770 00:42:25.780 voice here but the last one I only had
00:42:27.599 00:42:27.609 one call and that one was the door
00:42:29.400 00:42:29.410 switch was not being pushed in all the
00:42:31.260 00:42:31.270 way by the furnace door and of course
00:42:33.599 00:42:33.609 the door switch is almost like a
00:42:34.800 00:42:34.810 secondary power switch so for some
00:42:37.050 00:42:37.060 reason that's not pushed in that will
00:42:38.880 00:42:38.890 interrupt power to your whole furnace so
00:42:40.770 00:42:40.780 I guess the customer had taken off the
00:42:42.270 00:42:42.280 bottom door and when he put it back on
00:42:44.160 00:42:44.170 he didn't put it on correctly so it
00:42:45.690 00:42:45.700 wasn't pushing the door switching all
00:42:46.980 00:42:46.990 the way so all I have to do is put the
00:42:49.020 00:42:49.030 door back on correctly so the door
00:42:50.849 00:42:50.859 switch closes all the way and the
00:42:52.380 00:42:52.390 furnace
00:42:52.750 00:42:52.760 fired right back up well guys and that
00:42:54.880 00:42:54.890 is it for my list of furnace problems I
00:42:56.770 00:42:56.780 hope you found this video useful thank
00:42:58.630 00:42:58.640 you so much for watching all the way to
00:43:00.070 00:43:00.080 the end if you're not subscribed to this
00:43:01.840 00:43:01.850 channel yet don't be a stranger and
00:43:03.640 00:43:03.650 subscribe and as always don't forget to
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00:43:07.300 00:43:07.310 we'll see you next time
00:43:22.630 00:43:22.640 00:43:35.010 00:43:35.020
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