00:00:06.100 okay here we have a look at the furnace 00:00:08.77000:00:08.780 and we're looking for the transformer in 00:00:13.06000:00:13.070 this case there it is right there 00:00:18.33000:00:18.340 these things can be located various 00:00:21.19000:00:21.200 places but you are looking for something 00:00:24.97000:00:24.980 like that now that's on the side of the 00:00:29.14000:00:29.150 IFC in this one and these are the wires 00:00:32.20000:00:32.210 we're going to need to deal with okay 00:00:35.95000:00:35.960 here I'm depressing the door switch with 00:00:38.71000:00:38.720 my thumb and if you look down below 00:00:40.93000:00:40.940 you'll see blinking light 00:00:45.46000:00:45.470 there are several blinking lights on 00:00:47.43900:00:47.449 this machine but that's telling you if 00:00:50.61900:00:50.629 those lights any lights are on down 00:00:52.60000:00:52.610 there your 24 volt is working of course 00:00:56.35000:00:56.360 in this case a fan has started up so I 00:00:58.89900:00:58.909 know it's working however if I had 00:01:03.03900:01:03.049 nothing at all down there that means I 00:01:06.25000:01:06.260 don't have 24 volts also could mean I 00:01:08.56000:01:08.570 don't have hundred ten volts but the 00:01:12.61000:01:12.620 lights are going to tell me at 24 is 00:01:14.35000:01:14.360 there so essentially what I'm trying to 00:01:17.44000:01:17.450 do with the transformer and I'm going to 00:01:19.96000:01:19.970 show you one outside of the machine here 00:01:23.44000:01:23.450 right quick and its power in no power 00:01:28.51000:01:28.520 out okay here I'm showing a small 00:01:34.60000:01:34.610 transformer outside the unit may be a 00:01:38.17000:01:38.180 little easier to tell okay I've got 00:01:40.93000:01:40.940 probes in here now I'm not reading any 00:01:42.97000:01:42.980 power in the probes because this is the 00:01:45.91000:01:45.920 power coming in sometimes if you don't 00:01:48.91000:01:48.920 get it in there far enough they won't 00:01:51.25000:01:51.260 show this is very important when you're 00:01:54.31000:01:54.320 dealing with wire nuts you've got to get 00:01:57.82000:01:57.830 them in there so that they're making 00:01:59.23000:01:59.240 contact now this one doesn't appear to 00:02:02.17000:02:02.180 be so I'm going to loosen this wire nut 00:02:05.64900:02:05.659 a bit now you notice it just came up 00:02:09.96000:02:09.970 make sure your contacts if you're using 00:02:14.65000:02:14.660 wire nuts there's wire nuts on these 00:02:16.69000:02:16.700 thing make sure 00:02:18.62000:02:18.630 that your contacts are good I'm showing 00:02:29.03000:02:29.040 121 okay so there is power coming in so 00:02:34.01000:02:34.020 now we're going to look to power coming 00:02:35.27000:02:35.280 out now this one has three terminals 00:02:37.94000:02:37.950 there's only two of them that are really 00:02:39.38000:02:39.390 used here okay I show no voltage coming 00:02:43.52000:02:43.530 out so there's a problem with this thing 00:02:49.18000:02:49.190 voltage coming in no voltage going out 00:02:52.51000:02:52.520 okay let's find out why now I'm going to 00:02:57.59000:02:57.600 set my meters to ohm my meter to ohms 00:03:00.64000:03:00.650 and I have disconnected all power from 00:03:04.31000:03:04.320 this unit using o meter you not only 00:03:08.60000:03:08.610 have to disconnect power you have to 00:03:11.36000:03:11.370 disconnect the entire circuit going to 00:03:14.72000:03:14.730 it otherwise you're going to get bleed 00:03:16.55000:03:16.560 backs through loads and the light so if 00:03:20.42000:03:20.430 you're going to test for ohms you have 00:03:25.25000:03:25.260 to do it with the unit power off and the 00:03:28.76000:03:28.770 unit isolated so I'm isolated here I've 00:03:33.08000:03:33.090 got the probes on here and do not put 00:03:38.90000:03:38.910 your fingers at least both fingers on 00:03:40.97000:03:40.980 these things they will read a false 00:03:43.37000:03:43.380 reading and read mega ohms but it'll 00:03:45.47000:03:45.480 still read reading okay I'm well so that 00:03:50.15000:03:50.160 means my primary winding that's the one 00:03:54.35000:03:54.360 that got the 120 we're stepping down 224 00:03:56.80000:03:56.810 the primary has failed now I can go here 00:04:01.97000:04:01.980 to I don't need to at this point but I 00:04:03.83000:04:03.840 can go there and see my secondary 00:04:06.47000:04:06.480 actually does have continuity but again 00:04:10.21000:04:10.220 when I check my primary 00:04:13.30900:04:13.319 I do not have a circuit so the 00:04:19.18900:04:19.199 transformer is bad okay in another video 00:04:25.37000:04:25.380 we're going to talk about why the 00:04:26.81000:04:26.820 transformer failed usually the 00:04:28.87900:04:28.889 transformer is not the problem it's the 00:04:31.85000:04:31.860 weakest link in the chain so if your 00:04:35.48000:04:35.490 transformer has failed there's a 00:04:37.67000:04:37.680 procedure to go by to make sure that the 00:04:41.60000:04:41.610 second one does not break when you put 00:04:43.96900:04:43.979 it in and we'll talk about that the next 00:04:46.37000:04:46.380 video
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