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Coleman rv roof air conditioner

My 7300 series roof air conditioner has been working fine. Today it was on and the temperature in side was fine all day. This evening it starting getting a little cold inside. I pushed up the thermostat to stop (warm up the motorhome). It keep getting colder. I shut off the unit. The compresser keep running. I shut off the mains thinking the unit was frozen. An hour later I turned on unit again and compresser ran again by itself.. Any thoughts? fleed1@aol.com Lee.

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(1)Check compressor contactor or relay if it stock in the close position
(2)Check for welded contact points
(3)Check switch control for defect
(4) Check if compressor contactor still geting power when it is off


Let me know what works for you.

Posted on Mar 30, 2008

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