Question about Goodman GMS90703BXA Heater
My heater has an auto light and it is lighting you can see the flame going into the furnace then it stop a few seconds later it starts up again with the same result. The fan is blowing and its lighting up it just wont stay lit and blow heat . any advice
I found 1 part # GMP075-3 and serial # 9405083641 On a friends Goodman Heating Furnace. The Pilot will light but the furnace will only stay lite for a few seconds. He had accidently grounded out the unit while trying to plug it in. I pushed the reset button and it began working but now will only do the procedure I have mentioned.
My furnace pilot light is on but the burners will go off when we put the thermostat on auto. if we keep the fan on the burners will light but turn off the fan and and the burners go off
Posted on Jan 18, 2009
You have a low voltage (24) problem. I can be a number of different things. You will need a volt meter. Start at the thermostat. Go to the control board, then the temperature delay, thermal overload, ending at the gas valve. Check for power going in to a part and it should go out. Check for good wire connections. You really need to know what you are doing or else you will be just changing parts. Unless you get lucky this could get expensive. One tip I can give you is to by-pass the delay switch. Just connect the wires together and see if that solves the problem. By the info you gave I don't think that is the problem, but you never know. I would lean towards the board, or the thermostat.
The other guy, check the same and the power into the ignitor box and the high voltage coming out. and the flame sensor. Be careful with the ignitor it packs a punch!
Posted on Mar 02, 2008
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