Question about Dometic Rooftop RV Air Conditioner
Duo-therm Unit # 59516.501 Product # 991.731.749 serial # 52519748 Control Box # 3104998.004 Serial number E9390547 Purchased and was told that it kept things really cold, but brought it to Houston and air conditioner is not coming on, Heater works just great..Did not try Air in Tulsa, too cold to turn on, darn! should have!
I don't think these little units have a start capacitor but what I would do is check that the on/off switch wires to make sure they aren't loose. Also check the wires to the compressor for loose wires as well. It is possible that these are the first signs that the compressor is about to fail. They also can act up some when they haven't been used for awhile and then you try and start them up. Try running the unit for a few hours without asking it to cycle. It might just be a sticky valve.
Posted on Apr 13, 2009
SOURCE: duo therm ac problem
Same problem. I have a 2005 on a Rockwood Roo. Worked fine in October 2009. Not working June 2010. Problem is not a freon leak, compressor went bad. I banged the compressor gently with rubber mallet then with a hammer but that did not work. The fan runs, the compressor runs but gets hot. Also no indication of freon moving through system as everything gets warm from the compressor outward.
Posted on Jul 25, 2010
SOURCE: Duo Therm 59516 Roof A/C
First make sure the breaker isn't tripped. Next use a voltmeter to check for power on the primary and secondary side of the contactor with it pulled in. If you have power then check the capacitor. If it looks swollen then it is bad or you can check it with a multimeter with the capacitor test function or take it to a heating and air supply and they can check it for you. If the capacitor is good and you have power, then use an ohmmeter to check the motor windings for continuity. Locate the common wire and connect one meter lead to it. Then connect the other lead to the start winding and read the meter and then connect that lead to the run winding and read the meter again. You should have some resistance on both. There will be more on the start winding than the run winding.
Posted on Sep 03, 2010
I had the sam problem, took the thermostat cover off and tightend and refastend the wires, so far so god
Posted on Jun 19, 2012
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