Question about Dometic Rooftop RV Air Conditioner

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Unit comes on, then throws breaker

When my a/c unit comes on, after about 2 minutes, it throws a breaker. There is no other load on the any other circuit in the trailer, and the fan never blows...but i'm not sure if it is supposed to run for a short time before the blower comes on.

The unit has not been used for about 1.5 years and it is on a 2005 model travel trailer.

Thanks for any assistance you can offer!

David

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  • dawright Jun 01, 2008

    Thanks for the response. I'm not very familiar with these units so i'll be winging it. Is the fan motor access from underneath the unit or from the top side?

  • bwesterv Jun 10, 2008

    Hi all,



    Had the same problem, compressor would kick on, but no fan. Blew breaker after a couple of minutes.



    I toggled the system on and off about 5 different times, switching the fan from auto to 'on' every other interval. The fan finally 'released' after the 5th try. Seems like the fan was just hung up.



  • dawright Jul 19, 2008

    After removing the top cover, I manually rotated the fan, and yes, it was tight at first. After rotating manually a few times, the a/c ran perfectly! Thanks for the help!

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  • Master
  • 828 Answers

Fan should start at the same time as the compressor. If the fan is not running the pressure could build in the system and cause the breaker to trip. Your fan motor may need replacement, or lubricated if it is not a permanently lubricated motor bearing type. Oil ports will be located on the fan motor for front and rear bearings . There may be a dirt plug in the oil ports.

Posted on May 31, 2008

  • James Helmer
    James Helmer Jul 21, 2008

    Glad to be of assistance.

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