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I turn on AC and I hear a clicking sound but it won't come on in

This is a Coleman roof mount on a 97 Yellowstone. The fan part works fine but the AC part won't come on, just clicks several times and nothing.

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Relay need to be replaced

Posted on May 17, 2009

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1 Answer

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Sounds like possible fan capacitor failure. If your not familiar with capacitors, please find someone who is, as they can give a fatal electrical jolt if not handled properly.

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My coleman mah 3 roof top will not blowon fan side


Sounds like you have either a bad fan motor or a bad fan motor capacitor. When you turn the unit on with the fan not working, the compressor (the humming noise) runs and gets real hot real quick resulting in the compressor cutting off ( the nothing after) on it's inside high temp switch. This is what the compressor is designed to do so that when this happens, it does not burn the compressor out. Replace you fan capacitor, give the compressor an hour to cool, then try it. In most cases and if I'm correct, the unit will run just like you want it to. Good luck.
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Sep 09, 2009 | Coleman Mach III Air Conditioner

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Coleman mach 3 rv roof mount ac


You will need 12 vdc (battery or converter) for controls to work, and 115 VAC (hydro) for fan & compressor to work. With your fan obviously working, that tells me you have both already but compressor may not be kicking in. Do you hear a "moaning" sound or see lights dim when switched to cool?

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