Question about Dometic Rooftop RV Air Conditioner

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Air condition problem

My Duo Therm roof mount air conditioners (two of them) went out during a power surge. Can you tell me what would be a good place to start to trouble shoot the problem? I have power to both units but circut boards dont light up on either. Nor does fan start. Thanks

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  • seattlestyl Jun 30, 2009

    great answer question I would ask is does it sound logical that both units would go out at the same time? I have looked but have not seen reset switch on the compressors. As far as I can tell nothing trys to start up...

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What type of thermostat do you have? If the fan is not coming on and neither is the compressor, then is more than likely a problem with the thermostat of control units of the Air Conditioners. The fan will come whether the compressor does or not if the thermostat and control unit are working correctly. Check for twelve volt at the control unit of the air conditioner ceiling unit. (Red Wire, should be labeled)

Posted on Jun 30, 2009

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Hi...
Every air conditioner has a motor called a compressor. The compressor provides the cooling capacity for the air conditioner. If the compressor or its electrical controls are defective the compressor may try to start, fail, and create an electrical overload. If the unit does create an overload, every compressor circuit is also equipped with an overload safety switch. The safety switch is designed to protect the compressor from burning out. The safety switch will cut the power to the compressor for a certain length of time and then reset itself. When it resets it will allow the electricity to flow to the compressor once again. If the compressor then starts, the unit should function normally. If the compressor doesn't start when the overload resets, the overload will again cut the electricity to the compressor. This cycle will continue indefinitely. (Always allow three to five minutes before restarting the compressor.) If this situation is occurring, unplug the air conditioner and get help from a qualified repair technician. This problem is often fatal to the air conditioner because the cost of repair often exceeds the price of a new air conditioner...

hope this will give u a clear idea..
thank u
rate me!!!!


Posted on Jun 30, 2009

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