Question about Dometic Rooftop RV Air Conditioner

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Mod 59516:331 fan motor wount run, turns free, no fuses blown. A yellow wire from motor rubbed against compressor and has a small hole in it

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  • lwh172 Apr 08, 2011

    wire is intact, is it possible the fan start comp. is damaged due to the yellow wire making contact with metal. The 20 amp fuse and breaker is OK.

  • lwh172 Apr 08, 2011

    Is it possible the shorted yellow wire damaged the fan start comp. Fuse ok and breaker ok

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  • Master
  • 1,654 Answers

Are you capable of repairing this wire? If so splice it back together around the bad spot. Do you have a volt ohm meter to check for voltage at the motor? Can you chek for voltage at the selector switch also. Let me know if your getting 120vlt at the motor or is there power on the yellow wire that has a hole in it.

Posted on Apr 08, 2011

  • 1 more comment 
  • Dcramer531
    Dcramer531 Apr 08, 2011

    These motors rarly go bad, some coaches have multible fuses on these so check again for a fuse in a different location. Mine has a breaker and a fuse for the ac.

  • Dcramer531
    Dcramer531 Apr 08, 2011

    It is possible but it didn't trip any breakers so I am not sure if that is the problem. I need to look at a wire diagram and find out what the yellow wire is that your talking about. Have you had a chance to see if there is volytage at the motor?

  • Dcramer531
    Dcramer531 Apr 08, 2011

    The yellow wire is for the energy management system if you have one installed. There is a not that states (If an Energy Management System-EMS (load shed) is to be used with the control system, two wires must be routed
    to the roof opening of the zone to be managed. The signal required for this function is a normally open relay contact.
    When the EMS calls for the compressor to shut off, the relay contacts should close. Connect the air conditioner yellow wire to the EMS wires (if applicable). Do not allow the yellow wires to short out or touch, because the compressor will fail to run.)
    So You need to make sure the yellow wire is fixed, covered in tape and not shorting out anywhere., you may need to replace it. I don't think it damaged the compressor but it may keep the unit from running. You could have also have a bad relay contact on the compressor if it shorted out. I would replace the yellow wires, and then check and see if the contacts are pulling in when you turn the unit on, if so then I would start worring about the motor or the compressor. Let me know what you find and what you can get done.

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