Question about Dometic Rooftop RV Air Conditioner

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Penguin Duo therm AC bogs

My Ac will run fine for about 2 hrs and then bog down creating a significant voltage drop and if connected to a generator will trip the overload switch on the generator. This only occurrs after the temperature is reached and he compressor is restarting. This is a penguin 13500 Duo therm ac with an auto thermostate located on the wall. could this be a bad thermostate or a time relay switch that is faulty?

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  • asae Jul 09, 2008

    Thanks I will replace the thermostat.

  • bertbert May 14, 2009

    My Penguin used to do the exact same thing. It is now at the point that it will trip the generator cut out on the very first try and will now only start running on full 50 amp shore power, but no longer cools while rapidly cycling the compressor on and off? Can the excessive draw on start up be caused by the thermostat? It is on a 2007 unit.

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1 Answer

Try replacing the wall thermostat with an electronic unit. It sounds like it is short cycling. If there is not at least 5 min delay before trying to restart the compressor this is what happens. Most electronic thermostats have a delay feature built in to solve this problem.

Posted on Jul 09, 2008

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