Question about Dometic Rooftop RV Air Conditioner
There is no fuse near the compressor on the roof. The only thing on or near compressor is the thermal cutoff switch either located on the top of the compressor or the side (depending on the model). You can check the thermostat rather easily with a 12V Test Light (available at most automotive stores) or a voltmeter.
Take the face plate off of the tstat. You should have a 6 wires or so (again, depending the model or part number of the unit and the tstat). If you turn the thermostat to high/cool, the yellow from the thermostat should have power to it. This is the cool setting. If there is no 12V going to the yellow wire, then you have a bad thermostat. If there is power, then you need to get up into the control unit of the AC and see if you have power at the yellow wire there. If you do not, then there is a problem in the wiring in the wall. If there is power, then you may have a bad control board.
There is a relay on the control board that controls the compressor. If you turn the unit to High/Cool and you do not hear the relay clicking, then you have a bad board.
You may want to get a tech to take a look at it, it can get complicated.
Hope this helps,
Posted on Jul 03, 2009
Now the owner He's smiling, I asssume it is an older unit make sure the t-stat is set properly.cooling likely compressor issues could be start components or bad compressor get qualified service Good luck Tom
Posted on Jul 03, 2009
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Posted on Jan 02, 2017
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