Question about Dometic Rooftop RV Air Conditioner

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I have a dometic duo therm rooftop a/c on my camper. On initial startup, the unit performs fine and cools until it reaches the setpoint of the thermostat. A few minutes later though after the thermostat calls for a restart, the unit will run for a short time and then the breaker will trip. On occassion, I can reset the breaker and get the unit to keep running. This appears to occur randomly though. I'm thinking it's one of the capacitors?

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Possible capacitor, but I'd check what else may be drawing power at same time in trailer. Try running everything possible on propane rather than hydro so that there is no other, or minimal current draw besides AC, and see if that makes a difference. Not uncommon in some parks, for voltage to drop when everyone using all their power as well, and the more things that draw your voltage down, before AC kicks on, will cause a higher amperage draw.
If your hooked to an extension cord as well, that will cause higher amperage draw as well, if cord not heavy enough, or too long. Try shutting everything else off, that would draw hydro, temporarily when you restart AC, just to see what happens, and let me know.

Posted on Aug 07, 2010

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Posted on Jan 02, 2017

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