Year: 1978
Make: Carrier
Model: 58GS-75-3
Engine Size: ??
Ambient Temp: 75 F
Country of Origin: United States
I came home day before yesterday to find the fan in my Carrier natural gas furnace (split unit) running. I know there had been a power failure or surge during the day because the garage door opener had to relearn, the microwave clock was 00:00, the PC had rebooted, etc.
The A/C works, but the heat does not. The pilot comes on, but the burner does not light.
I ASSume the control board took a dump and the fan is running because that it its default mode. I have found replacement boards from $48-$350, which seems like quite a spread. Carrier's number on the board is 302075-302.
What say the home HVAC experts? Am I on the right track?
Thanks,
Steve
Have you tried to reset it by cutting the power for a few minutes and turning it back on?
Is this that electronic ignition module? If so, had a similar problem with mine, not suppose to take it apart, but did anyway, had two relays, one for the pilot, the other for the main valve if the pilot was on and detected, would switch in the main valve relay. Both had relay contacts so bad, nothing left to clean so replaced both relays with new ones, working great again, spent around ten bucks.
mk378 -- Yes. In fact, it was unplugged all Wednesday night and all Thursday. The blower starts running as soon as the furnace is plugged back in.
Nick -- Dunno, Carrier calls it a control board. It is the only "electronic" piece in the furnace. It has two relays on it, but they don't *appear* to be sticking. I can post a picture tonight when I get home.
-- Steve
Had, my furnace apart last week, yeah, my heat exchanger is over 23 years old. What I couldn't believe was the carbon build up over the last year, getting a very nice blue flame, checked the entire chimney for restrictions, good air flow.
Can only contribute this to the quality of the natural gas I am paying three times the price for, are they adding powered coal to it? Is it made in China? Are you seeing the same thing?
Well, it's nice and clean again, and really don't want to pay somebody 75-85 bucks an hour to come here and clean my pipes. Actually would be cheaper to toss that dirty furnace away and put in a new one. But that will get dirty too. Still vividly recall the days I was shoveling coal and hauling out ashes, that is much easier today.
Mr Bill:
This unit was cleaned and inspected by a pro last year. He said that everything looked good. The thermocouple and the gas valve have both been replaced professionally in the last 5 years. I am in Northern California, so our winters are not what most would consider cold. I have fuscias growing in my front yard that survive over the winter without being covered.
My thoughts of possibly fixing this myself have more to do with saving time than money. If I call a pro, I will most likely have to take a vacation day from work. I live about 45 minutes from work, so I can't just "pop home" with 10 minutes notice.
I appreciate everyone's input. I still may call a pro, I'm undecided.
-- Steve
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