Question about Dometic Rooftop RV Air Conditioner

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Air conditioning won't work. Maybe no ground

We have a 2006 Dutchman 5th Wheel Toy Hauler. We haven't use the it for a long time. We ran the lights and a/c for about 4 or 5 hours and than all of the sudden it turned off. The lights and a/c came back on about 5 mins later than quit. The lights and a/c came on again ran another 4 or 5 hours and than lost the same lights and air conditioning again. Now the lights and a/c won't come on at all. When we grounded the control panel for the a/c we found that the air will come on but the lights won't. We suspecting it might be the ground? We should be look for the main ground. What do you think is happening? Thank you

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  • Farley Redfield
    Farley Redfield May 11, 2010

    Sounds like your on the right track but let me be clear DO NOT TRY TO FIX A GROUND WITH ANY POWER TO ANYTHING. This is more dangerous or it can be than working on the HOT side of a live circuit.

    Take a VOM and check across your power AC LINE coming into the BOX feeding everything. BE VERY CAREFUL! A loose ground on 110 IS looking for a ground and a spark or snap if your not expecting it can cause you to get a cut or worse. (The main thing is are you using the inverter to power the lights or AC power)? Could be that your battery is down and you need to clean up the terminals to allow it to charge and put your lights back on assuming they are on DC POWER. Check your inverter mfg recomendations. Hope this helps and you can give me a good word \here. Let me know if I need to be clearer on any of this. OH yes if in doubt about which power your lights are using remove the bulb and read what it says AC bulbs have rating in AC and DC in DC. They are NOT interchangable.


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Open your elctrical panel on your fifth wheel and make sure the wire terminals are tight comming in from the electrical power cord.

There could also be a issue with your power converter. Try turning your circuit breakers off and back on.

Posted on Mar 31, 2009

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