Question about Goodman CLQ36AR49 Air Conditioner

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Gas Package Unit Keeps Running with all T- stat wires unpluged at the unit?

(New goodman 3 ton gas package unit) I Replaced the board in the unit, I have the same problem with the new board as I did with the original board, the unit will not stop running.I unplugged the thermostat wires in the unit and wire caped I then plugged in the disconnect. The unit starts right up in adition to that my led light is blank I cant see having two bad boards any sugestions I am having the same problem with my fathers two and a half ton gas package unit. After two new boards, after a heating cycle the combustion exhaust fan and circulating fans continue to run. Everything in it has been tested and checks out, but those two fans are still running.

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  • local24801 Jan 30, 2009

    The loop has been checked, the thermostat wires have been checked. Two new boards in it and after a heat cycle with the gas burner the combustion motor and circulating fan continues to run. After it is turning the burner off it blows the board fuse. Two servicemen along with myself have worked on this unit and it still runs. As soon as you put the disconnect in the combustion motor kicks in and does not shut off.

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  • Master
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Hi and welcome to FixYa,

Based on your description, it would appear that the contacts of the switching relay are burned and have fused together. This would then make what ever the relay(s) are controlling switch on soon as plugged to the mains. Should this hold true, then it would be immaterial whether the thermostat is working or not or even for that matter wired to the system or not.

In some designs, the relays are on the printed circuit board of the controller while in some, it would be separate/external. Some designs also place a capacitor across the relay contacts to prevent arcing. Should the capacitor be faulty/shorted, it would exhibit the same, it would act as if the relay is engaged.

Would it be possible for you to post the wiring diagram if one is available?

Pls post back updates. Good luck and kind regards.

Posted on Feb 01, 2009

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  • Goodman Master
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Have u tested the gas valve?

Posted on Jan 30, 2009

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  • Expert
  • 326 Answers

Its the problem of the connecting switch which does not stop the powering .replace the power switch

Posted on Jan 27, 2009

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