Question about Dometic Rooftop RV Air Conditioner

1 Answer

RV AC/HP Rooftop 15,000 btu Penguin

The a/c is cooling. It does not hum or cause lights to dim. It simply won't stay on long enough at one time to get to the set temp on the CCC. It will only stay on 10 minutes at a time, shutdown and restart 3 minutes later. The unit is clean and free of obstructions both outside and inside. Fins are not bent and the coils are not freezing. The unit does finally get the r.v. cooled to the set temp (which by the way is only set about 10 degrees below the outside highest temp of the day) late into the evening. I feel it is cooling well enough but just not staying on long enough at one time to get to the desired temp.

Does this answer your questions to my problem?

Posted by kamper2 on

  • kamper2 Aug 16, 2008

    I think the solution that motor158 fits my situation and I will try this first. In the meantime, I will contact Dometic if that does not solve it. Thank you.

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1 Answer

Mike Butler

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Is there by any chance a cool air duct or register, or maybe return air duct near the thermostat, or perhaps on opposite wall,(behind it) that may be throwing it off? Have you tried just draping a small towel or facecloth over it to see if that changes anything? I've had one that acted similar in a 12 wide, and it turned out to be that the return air was directly behind it, and caused cool air to rush in around hole for wiring of thermostat, causing it to kick in & out about every 5 minutes. Heard a whistle when I was checking thermostat, and a light went on in my head. Plugged the hole up good & all was well. have you tried this number & link to contact tech assitance at dometic for some advice on it? Phone 1-800-544-4881 and ask for technical assistance. [email protected] <[email protected]>

Posted on Aug 15, 2008

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