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Unit will not shut off by itself.

I have a Coleman furnace/ac inside unit in a mobile home, that works fine, but will not shut off by itself. The thermostat was tested and is fine. We have had 2 repairmen out to look at it and they can't seem to fix the problem. The relay was replaced and the outside unit (Carrier) was cleaned. Please help!!!!!

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A/C only will not shut off would check for low refrigerant charge. If furnace also will not shut off (remember fan will run for short time before shutting down) then either thermostat is wired wrong or control board is defective

Posted on Jul 11, 2008

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