Question about Goodman GMS80903BNA Heater
Your system has a diagnostic light that blinks a code if there is a problem. look at the lower section of the heater, there should be a small viewing port looking into the cabinet. you may have to remove a cover but if you remove the wrong one, it cuts power to the unit and erases the error code. once you get the code, look on the wiring diagram for a diagnostic chart. this will give you a starting point where the problem is.
Posted on Oct 11, 2010
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Posted on Jan 02, 2017
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