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Furnace Cycling On and Off - Flame Sensor Cleaning - Furnace Troubleshooting
WEBVTT Kind: captions Language: en
00:00:00.030 go over a couple troubleshooting tips 00:00:01.64000:00:01.650 for a furnace if it's not getting hot 00:00:03.35000:00:03.360 enough or if it's cycling on and off 00:00:05.03000:00:05.040 very quickly and here we have a carrier 00:00:07.82000:00:07.830 furnace not just show you in the style 00:00:10.00900:00:10.019 the way to get inside is just unscrew 00:00:14.20900:00:14.219 this bolt on the very top and it's going 00:00:18.92000:00:18.930 to allow us to open up the furnace so I 00:00:25.49000:00:25.500 turn the heat on and now it's calling 00:00:28.67000:00:28.680 for Heat the igniter is going to heat up 00:00:44.79900:00:44.809 and you see the hider on the left here 00:00:46.66000:00:46.670 nub 00:00:55.13000:00:55.140 and now it's called gas to ignite the 00:01:00.86000:01:00.870 flames on the burners but that it shuts 00:01:04.93900:01:04.949 itself off so if you have a situation 00:01:06.74000:01:06.750 like this what you have 90% of the time 00:01:09.80000:01:09.810 is just a dirty flame sensor so we'll go 00:01:12.23000:01:12.240 through the steps on how to clean it so 00:01:15.74000:01:15.750 the right side of the furnace there's a 00:01:17.24000:01:17.250 small metal rod and sometimes it's going 00:01:20.30000:01:20.310 to be straight and sometimes it's going 00:01:21.86000:01:21.870 to have a 90-degree angle to it so all 00:01:24.05000:01:24.060 I'm going to do is remove this and we 00:01:25.64000:01:25.650 don't want to touch it with our hands 00:01:27.05000:01:27.060 get any oil on it but almost all of them 00:01:29.63000:01:29.640 are held in place by one screw and I'm 00:01:31.52000:01:31.530 just using a nut driver to loosen this 00:01:39.99900:01:40.009 and now I'm just going to remove the 00:01:50.93000:01:50.940 flame sensor and that's all there is to 00:01:52.79000:01:52.800 it again you don't want to touch it you 00:01:54.23000:01:54.240 don't get oils on this and you can see 00:01:55.58000:01:55.590 the debris that builds up on this and 00:01:57.70000:01:57.710 all you need to do is just take 00:02:00.83000:02:00.840 something that's just slightly abrasive 00:02:03.64900:02:03.659 and in this case I'm just going to use a 00:02:05.51000:02:05.520 new 5 dollar bill and I'm going to clean 00:02:11.72000:02:11.730 it off and you can use if you have a 00:02:15.16000:02:15.170 very very fine sandpaper or an emery 00:02:19.61000:02:19.620 cloth you can use that too you don't 00:02:21.17000:02:21.180 want to be too aggressive because you 00:02:23.18000:02:23.190 can actually scratch it and shorten its 00:02:25.00900:02:25.019 life but just by doing something as 00:02:27.71000:02:27.720 simple as that's just cleaning this off 00:02:29.77000:02:29.780 we should be able to solve our problem 00:02:32.36000:02:32.370 and if you do this once every year or 00:02:35.39000:02:35.400 once every couple years you'll add years 00:02:39.05000:02:39.060 of life to the flame sensor so now we're 00:02:41.66000:02:41.670 just going to feed it back into the 00:02:44.09000:02:44.100 bracket that holds it and we want to 00:02:46.91000:02:46.920 make sure the angle is the same we need 00:02:50.15000:02:50.160 that to be setting into the flame of 00:02:53.00000:02:53.010 that burner and usually 00:02:55.71000:02:55.720 the bracket holds it in one position but 00:02:59.01000:02:59.020 just make a note of the position before 00:03:03.69000:03:03.700 you remove it so that you can make sure 00:03:05.46000:03:05.470 you put it back in the same location so 00:03:11.22000:03:11.230 now we'll turn up the heat and see if 00:03:13.68000:03:13.690 that solve a problem plus steps 00:03:21.15000:03:21.160 so we turn the heat back up and we'll 00:03:23.49000:03:23.500 see if the flame stay on now 00:03:34.05900:03:34.069 so it looks good so looks like we solved 00:03:36.36900:03:36.379 the problem so very easy way to repair 00:03:39.00900:03:39.019 most furnaces if they're just cycling on 00:03:41.94900:03:41.959 and off too fast is to clean the clean 00:03:44.02000:03:44.030 the flame sensor
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