Question about Dometic Rooftop RV Air Conditioner

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I have a 13,500 Dometic A/C that usually blows cool air but sometimes changes sounds and blows hot air for a while before switching back to cold. What do I need to fix?

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Could be the compressor overload on the way out. Or an intermittant temp control. Or it might just be a loose connection at the junction box between the roof and the base.

If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

Posted on May 04, 2010

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Check the unit to see if the outdoor fan and compressor are coming on. If not, check to see if power is reaching the contactor, both the high power contacts and the low voltage solenoid. Some contactors can be manually actuated, and a quick press (with a NON CONDUCTIVE ITEM) can show you if the contactor is engaging. If the solenoid is not working, check the wiring of your thermostat. When set to cool mode, there should be voltage on the solenoid of the primary contactor, sending power to the outdoor fan motor and compressor.

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Check those and post back. And, I know... it really is Dometic.


If the problem is the first one,

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1 Answer

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