Question about Goodman GMS90703BXA Heater
Your furnace has a diagnostic light in the unit. Look for a small see-thru window either on the top panel or the bottom panel. Look for a blinking light. Record the number of blinks. Now remove the bottom panel and look at the wiring diagram. There will be a error code list explaining what the blinks represent. If you open the panel prior to looking thru the window, you will erase the code. Changing the thermostat is not the solution. Good Luck.
Posted on Sep 09, 2009
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Posted on Jan 02, 2017
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