Question about Goodman GMS90703BXA Heater
Can anyone help? Gas furnace will ignite but won't stay lit. I thought it was the flame sensor, but I replaced it and still not working? Could the be a circuit board problem? If so how can I be sure? Goodman GMPN 120-5 my goodman will ignite the burners but they will blow out.it will cycle a few times then shut down.please help.
There is a vacuum sensor on most units tied from the exhaust gas fan to the sensor. Does the unit try to start? If the unit's exhaust fails to pull the switch it will turn off after about 30-45 sec after starting. "IT" thinks it's not exhausting and stops to keep from overheating. Do you have this exhaust fan and rubber hose to sensor? Can you see if that fan is turning on start?
Posted on Nov 10, 2007
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Posted on Jan 02, 2017
Try replacing the filter. Low air flow will allow the furnace to overheat. Sounds like a simple answer. Wish I had tried it before buying a flame sensor and controller. Live and learn I guess.
Posted on Jan 02, 2007
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