Question about Dometic Rooftop RV Air Conditioner
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Posted on Jan 02, 2017
SOURCE: Duo-therm fan only runs on low
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
Thermostat on wall, or manual controls at AC? Did it work for you on low before now? Reason I ask, is that normally they are only a 2 speed fan ( low and high) so if it's a wall thermostat and has been changed from original, perhaps it the way the thermostat is wired.
Posted on Jul 10, 2010
Can you give us some more helpful information-- so we can help diagnose the problem:
Like-- what is the outside temperature?--
Have you been able to get heat out of your heat pump before, at this low of an outside temperature?
And which fan are you talking about-- the inside fan, or the outside fan?
Is the inside coil getting nice and warm-- or just barely warm?
and is there frost on the outside coil-- Can you defrost it, but shutting the unit off until the ice is cleared?
Let us know, and we'll better be able to help you to the next step.
Posted on Jan 15, 2011
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