Question about Goodman GMS90703BXA Heater
Will run good for a day, then I'll come home and notice it cold in the house.
Sometimes, turning power off to furnace, and turning it back makes it start working for a while.
Other times, the draft motor will spin up for a few seconds, then stop - solid red light. If I wait a while, it will try again. If I power off and power on, the same thing happens, but the motor starts for even a shorter time.
I replace the thermostat, thinking that I'm getting marginal voltage through, that seemed to help, but then next day, same issue.
I measured 29 volts at the transformer.
Since there is no light flashing, it's like it thinks that the thermostat says it should stop, and not an issue with limit switches, pressure switches, etc.
If the draft motor starts then shuts right off and then a red light comes on usually means that there is a blockage somewhere. Check the pressure switch line, make sure that it is clear and the hole in the heater that the pressure switch vaccum line runs to is open. If that checks out then make sure that your flue vent cap is on and that it is not pressed down on the flue vent and that the gases can vent properly
Posted on Feb 13, 2009
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Posted on Jan 02, 2017
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