Goodman Heating & Cooling - Popular Questions, Answers, Tips & Manuals
GMS80903BNA goodman furnace. Short cycling
I have the same problem. The vent flu. Is building up condensation and running back into the furnace and cloggs the little black vent hose with water. Then it comes back on then off etc.
somehow the trick is to make as straight of an upward vent flu as possible ( definitely not 45 degree elbows and really not 60's either) seal all connections with glue.
Furnace control board fails
possible burner tube blockage or flame sensor dirty or bad when fails see if voltage to keep gas valve open
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