Question about Dometic Rooftop RV Air Conditioner

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Air conditioner not working plugged in or on generator, heat not working either--nothing 2000 jayco designer

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  • wsagehom Jul 18, 2009

    Tried all fuses, breaker on 120 VAC, no sounds no air no clicking...could it be relay switch? And where is that...thanks.

  • wsagehom Jul 18, 2009

    It is a Jayco 2000, class C Designer, mini motorhome. The airconditioner is a "RVP". Last time we used it was at the end of camping season..Oct? Never had any problem. The thermostat is a heating and cooling one, I would have to look up the name. What about a relay switch?

  • wsagehom Jul 19, 2009

    ok-its a unit that has ducts throughout the camper in all the rooms. I do have the multimeter and tested the actual thermostat fuse it's fine. I don't thing there was any noise whatsoever from the fan but I'll try again. I do have all the model numbers and will post them later. Thank you so much for the help it's much appreciated!


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If you have AC hydro for sure to unit, perhaps a fuse in the 12 volt DC panel has blown, or in thermostat itself. Hear any clicking at AC unit when turned on? If not, check all your fuses in 12 volt DC panel. Check breaker didn't trip also on 120 VAC.

Posted on Jul 18, 2009

  • Mike Butler
    Mike Butler Jul 18, 2009

    When was last time it worked? It says it's a dometic correct? And what does your thermostat look like, model if you have it.

  • Mike Butler
    Mike Butler Jul 18, 2009

    O.K. so it's a Coleman. Will need to know what ceiling assy you have as well, ducted or non ducted. Non ducted blow cold air out ends at ceiling, ducted blows out all ducts in all rooms in ceiling.If you just remove filters, you should be able to see model numbers. There will be one set of numbers on ceiling assy itself & another sticker on base of upper unit that will start with , 7330,8330, 9330, 9530, then a letter or 2 then about 3 more numbers. The reason I need that is because they are wired according to models. With no clicking at all going on, I don't want to start guessing. When I get this info, I can tell you better/safer what to do. Do you have a multimeter by chance & know how to use it? If you listen real close & turn it on to fan only, can you hear a faint "Hum" from AC?


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