Question about Goodman GMS90703BXA Heater

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Goodman furnace went out. Light blinks four times

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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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