Question about Goodman GMS90703BXA Heater
I followed the start up procedures including lowering thermostat to lowest point, removing electrical service, turning the valve to the off position and venting air from gas lines. Yet, the unit continues to fail start-up after the first to steps in the start-up trial.
Remove the front panel. Tape the door switch to the closed position. If the thermostat is calling for heat the furnace should do the following: a light on the circuit board will flash and then the exhaust blower will start. A few seconds later (10-15) you should hear clicking at at the circuit board and an orange glow should be seen thru the small viewing port. A few seconds later the gas valve should open and the orange light will turn blue. If the blue flame only lasts a few seconds and then goes out, their may either be a blockage not allowing the flame to travel to all the burners and not allowing a flame sensor to sence flame, shutting down the unit. After a few cycles of not starting, the circuit board will flash a series of codes that you can read if you look on the back of the front cover. It will give you a starting point where we can research and come up witha more difinitive answer. Let us know what you find for codes.
Posted on Oct 26, 2007
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Posted on Jan 02, 2017
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