Question about Dometic Rooftop RV Air Conditioner

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Duo-therm fan only runs on low

I have a duo-therm self-contained air-conditioner/heat pump basement unit that the fan will not change speeds....how do I trouble shoot this

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Useually a sticking fan relay in the controll board this is the closeest unit to a home based cenral air system and i would leave this one to the experts if you want to trouble shoot there is a detailed wiring diagram on the back side of the pc board cover on the fan and compessor unit it self there is a seperate relay for each speed on your unit make sure getting power to selected relay if not trace wiring and do continutity tests back to themostat

Posted on Aug 01, 2009

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Posted on Jan 02, 2017

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