Question about Goodman GMS90703BXA Heater

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Goodman GMP075-3 ignition problem

When I turn on the power, the inducer comes on, the control board clicks, the ignitor bar glows, the board clicks again, and the ignitor bar stops glowing. It seems like the gas valve isn't opening to allow combustion of any kind. I've replaced 1 rollout switch, the flame sensor and the control board. What should I do next? Replace the limit control switch and the pressure switch? How often do gas valves go bad? Could it be that the gas valve has stopped working?

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OK, if the furnace is not lighting for even a few seconds, you have either a bad gas valve, bad wire, bad control module or no gas. The pressure switch is not the issue. Check all wires to the gas valve and look for 24 volts across them when the ignitor glows and you hear the click. Then test for 24 volts to ground. It could be a bad ground wire.

Posted on Oct 21, 2008

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Accurate Joe
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SOURCE: Goodman GMP075-3 ignition problem

Test while the unit is firing with a meter. you should have 24 volts going to gas valve. If you do and no gas is coming out, you have a bad gas valve. You will need a gas pressure test kit to install a new one correctly.

Posted on Dec 01, 2008

6ya6ya
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Posted on Jan 02, 2017

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