Question about Goodman GMS90703BXA Heater
Your main limit switch is activated. Maybe for good reason. This switch keeps the furnace from overheating. I have the same problem right now and I think my a/c coil may be blocked, limiting air flow through the heat exchanger and the furnace. Does your gas and main circulating fan come on for a few minutes before the switch activates and the light begins blinking?
Check your furnace filter and any return air ducts in your home - see if they are blocked or restricted.
Posted on Jan 18, 2009
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Posted on Jan 02, 2017
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