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Old 10-18-2008, 10:54 PM   #31
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Ok now we are going to check the transformer. Thats the big coil that the black wire from the safety swich goes to.

Is that what you see? The black wire going to the big coil?

Tell mw hat you see. I'll be here til we find out the problem for sure.

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Old 10-18-2008, 10:57 PM   #32
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yes the black wire goes in to the bottom of the panel and splits into 2 smaller wires..one goes to the big coil and the other end plugs into a black box with 7 plugs on it.
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Old 10-18-2008, 11:52 PM   #33
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Quote:
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yes the black wire goes in to the bottom of the panel and splits into 2 smaller wires..one goes to the big coil and the other end plugs into a black box with 7 plugs on it.

The big coil is a transformer. There should also be a white wire going to the coil. It steps down 120 v to 24 v.

The 24 wires should come out of the opposit side of the transformer rom whee the black and white wire 120v went in. They will be of smaller guage and usually not white and black. Find were thes connect and see if there is 24 v present.
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Old 10-19-2008, 12:17 AM   #34
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found them they were blue and yellow, the blue came out and around to the white box on the front of th panel marked "24 vac", and the yellow went to the back of i believe the "C" terminal"..i got nothing ..when i tested them.
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Old 10-19-2008, 12:39 AM   #35
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OK understand one thing :I know that unit but I am no there with you. So I am condtionally saying the transformer is gone.

As long as you had power to the furnace and you pushed in the safety switch when you tested the 24 v side of the transformer and got nothing than it should be it.

I would bench test the transformer out side the furnace. If it still checks bad buy a 40va 120v to 24v transformer,

Now listen, trans former don't usally go bad on their own.

Before you you put the new one in remove all the thermostat wires from the RWYC terminals. Install the new trans. Wit the power off of course.
When you get it first turn the heat up as highe as it goes. Connect red to R terminal.
Turn on power and check for 24v from R to C. If you HAVE 24V put white wire to W terminal.

It should fire now.

BEWEAR YOU COULD HAVE A SHORT IN THE T'STAT WIRES. CHECK EACH WIRE WITH AN AMP METER AS YOU PUT IT ON, IF THE AMPERAGE STARTS TO CLIMB OVER 1 AMP KILL THE POWER. THAT WILL BE THE WIRE WITH THE SHORT.

nOW I AM GONNA GO GET LAID AND POP SOMe PILLS I DESERVE IT.

GOOD NIGHT.
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Last edited by hvaclover; 10-19-2008 at 12:43 AM.
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Old 10-24-2008, 08:38 PM   #36
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Thank you for your time and mostly the help i know it was probaly real trying on your end to put up with my constant pestering.., that was the problem so a new transformer was 30 bucks, it is in and installed...and we are warm.

~joe
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Old 10-24-2008, 08:59 PM   #37
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No prob. That's what we're here for. Hvac guys burps co2 and fart freon we are so into this gig LOL
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Old 10-29-2008, 05:54 PM   #38
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Buhler
Sounds to me like you have a low voltage problem with a fuse to the transformer or the transformer itself. Find the transformer and see if you have 24v on the red/blue or yellow/blue wires from transformer. If no voltage either transformer or fuse leading to transformer (some units do not have fuses inline with transformer.


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Old 10-29-2008, 08:39 PM   #39
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Quote:
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Buhler
Sounds to me like you have a low voltage problem with a fuse to the transformer or the transformer itself. Find the transformer and see if you have 24v on the red/blue or yellow/blue wires from transformer. If no voltage either transformer or fuse leading to transformer (some units do not have fuses inline with transformer.


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He already did that simpleman
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Old 11-11-2008, 03:52 PM   #40
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Hi, I'm in the suburbs of Detroit also. And I have the same problems as buhler. Transformer shows 24 v. no blower, or ignitor action. Have 80s Comfortmaker electric ignition, vents thru chimney, no inducer. I've jumped red and white at thermostat, nothing. 120v to furnace OK, blower door switch held in I can hear very slight hum, I'm thinking from the transformer. Blower cage spins freely. Any thoughts, or what did buhler do? Thanks
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Old 11-11-2008, 04:08 PM   #41
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Ignition module problem, probably vent limit switch open.


Funny you should mention this right now; I was just taking inventory of parts stock and I got more parts for your furnace then I'll probably use on a service call..
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Old 11-11-2008, 07:32 PM   #42
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Hi Thanks, Yes broken wire at the switch, reattached and I have heat, thanks. May need those parts. Hope I don't, but who knows? I'm Downriver.
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Old 11-11-2008, 08:15 PM   #43
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Quote:
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Hi Thanks, Yes broken wire at the switch, reattached and I have heat, thanks. May need those parts. Hope I don't, but who knows? I'm Downriver.
Not far...Sterling Heights.

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