Question about Dometic Rooftop RV Air Conditioner

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My father hooked up a 30 amp to my camper thinking it was a 240 an it is a 120 and my roof top a/c made a numming noise, now that we have put it on 120 everything in the camper works but the a/c. Do you think the whole ting is burnt or maybe just the fan motor.

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  • Dometic Master
  • 3,287 Answers

The only real way to determine what has failed and how much it will cost to repair is to have it checked professionally.

With that said; I suspect that the compressor and fan motors are both toast - assuming that the thermostat was set to turn the unit on to cool the space. But, the damage doesn't end there - any transformers, electronics, etc. that have been exposed to the higher voltage have probably also failed as well. Those components that haven't failed - will likely have a significantly shorter life due to the exposure to the stress of the higher voltage. The only real variable is the amount of time that the components were exposed to the higher voltage. If it were only brief; there is a much better chance of things working. Applying twice the amount of voltage however, allows for only the briefest exposure time.

Good luck!

Posted on May 24, 2011

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