Question about Goodman GMS90703BXA Heater

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Heater will not shut off runns continously, have to flip breaker

My heater and central air when turned on will run continously the only way I can get them to turn of is flipping the breaker. I have change the thermostat out two times, and installed a new control board. Any other things I might try?

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Maybe youhave a pinched thermostat wire. If the room air blower is blowing, At the control board remove the wire located on the G terminal. What keeps this blower turning is a connection between the R and G terminals. The heat is caused by a connection between the R and W terminals. So if you disconnect the R wire and the unit turns off, you do have a short in the thermostat wire. If it keeps going, you have a bad board.

Posted on Oct 13, 2009

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I am guessing its just the fan that keeps running? If so you have a sticking fan relay It is part of the control board. You would need to repace it.

Try tapping on the control board on the little black box and see if it shuts off.

Posted on Jul 27, 2009

  • jeremy2142
    jeremy2142 Jul 27, 2009

    I did not see yo had replaced the board.

    Try undoing the thermostat wires from the furnace Does it still run? If not you have a short in the thermostat wiring in the wall somewhere.



    If it still runs then you may have a bad limit switch somewhere and the fan will run Is there a flashing light check the number of flashes and there will be a code somewhere on your panels there should be a legend for the code.

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Check the relays!

Posted on Dec 12, 2008

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