Blown transformer

**youngw** · 02-06-2005, 09:59 PM

I installed a new Comfort-Aire gas furnace in my sisters house today. After getting everything hooked up. I turned the thermostat up to start the furnance. The inducer moter ran for about 10 sec and we heard a pop come from the area of the control board and everything stopped. We inspected the control board for any signs of visible damage (burns) but did not see any. After checking for power to the board and to the transformer everything checked out OK. When we checked for power from the transformer there was none. All of the wiring was doubled checked and all was OK. The thermostat that is in the house is a Hunter. I know of Honywell and White-Rodger thermostats but did not know that Hunter made a heating/cooling thermostat. My question is, could the thermostat have caused the problem?

**Gunnery Sergeant Hartman** · 02-06-2005, 10:03 PM

This is not a DIY site...

**fixit50** · 02-06-2005, 10:16 PM

Model # of the furnace and the phone # of the supply house you got it from would help. Again this is not a diy site. but could you tell us more where you got the unit?

**Toolpusher** · 02-06-2005, 10:50 PM

Answere is No,
the t-stat did not cause the problem.

**Swampfox** · 02-06-2005, 10:52 PM

My guess is you have a faulty installer, you can find a new one in the Yellow Pages

**youngw** · 02-06-2005, 11:06 PM

First off I didn't say I was a DIY. I've installed furnancs before and had no problems. I asked a simple question, as I have seen on this forum. Also, I have no clue why asking for the number of the supply house I bought the furnance from has anything to do with the problem.

**coolguysfl** · 02-06-2005, 11:27 PM

The low voltage issue you describe is very simplistic in nature, you have a short.

What you interpet as an abrasive response is professional fustration that if a minor problem of this sort has you stumped - you have no business installing / servicing products that could burn a house down or kill someone.

The vendors Ph # was requested as he should be chastized for putting dangerous products in your hands. Ok - so now you saved a few bucks. It's time to call a professional B4 you hurt yourself.

**Gunnery Sergeant Hartman** · 02-06-2005, 11:32 PM

Originally posted by youngw
First off I didn't say I was a DIY. I've installed furnancs before and had no problems. I asked a simple question, as I have seen on this forum. Also, I have no clue why asking for the number of the supply house I bought the furnance from has anything to do with the problem.

Unless you are a licenced contractor with insurance, you are a DIY'er.

**docholiday** · 02-07-2005, 10:00 AM

Originally posted by swampfox
My guess is you have a faulty installer, you can find a new one in the Yellow Pages

Lol. prolly should get a few spares just in case

**indian** · 02-07-2005, 11:43 PM

I've seen other techs start speaking in tounges,pulling their hair out, throwing their tools, going home, kicking the poor dog and jumping off roofs when trying to trace out a low voltage short to ground! Does this give you any clue why we can't help unless we're there? Don't forget we will need to be paid for all this!

**youngw** · 02-08-2005, 02:03 AM

It was not my intention do offended anyone by posting my question. As I stated before I'm not a DIY. I have been doing this type of work for a number of years. My father was in the HVAC trade for years and also my brother was in the trade. I thought this was a simple question to see if anyone else had this type of problem happen to them.

**coolguysfl** · 02-08-2005, 05:59 AM

I have an uncle that is a doctor.... I still can't perform surgery, unfortunatly knowledge is not gained by osmosis. Family members in the trade don't automaticly enable you to opperate in the industry.

You install HVAC for a full time living? Are you licensed? Are your insured? How many continueing education classes per yr do you attend?

There is no secret we're keeping from you. If you wish this knowledge - go to school.

I repeat: What you interpet as an abrasive response is professional fustration that if a minor problem of this sort has you stumped - you have no business installing / servicing products that could burn a house down or kill someone.

**brettln** · 02-08-2005, 07:39 AM

That is definatly a direct short. I really would call someone a little more advance in electrical skills. It sounds like you might want to look at the back of your board to confirm there was damage to it.
I really would call someone though. If you still insist in installing it yourself, get a transformer w/breaker. Not that thats going to protect you against any damage occurring or any damage that has already occurred.

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