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Goodman gmp0503 unit has status light blinking slowly all the time. The indoor blower wont even come on when you switch from auto to fan on thermastat. The status light says for one blink to check gas flow, gass pressure, gas valve, or flame sensor. Good one of these problems keep the blower from turning on?

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Take a jumper wire and jump out the R and W terminals on the furnace. The heat should come on. If it does not, you have a bad board. A steady blink indicates no call for heat. You may have either a broken thermostat wire or a bad thermostat if unit fires when you jump it.

Posted on Mar 20, 2011

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