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Dometic Duo therm RV a/c rooftop unit. 15,000 btu with heat pump. model 620515. age 5 years. Problem- will not always stay ON. Starts and cools fine. but shuts off within 5 mminutes sometimes.. or will run for hours and hours with no problems. when it stops, I can sometimes restart it by cycling thermostat.. if that does not work I can unplug thermostat from 12v power and then it starts when asked to. Have replaced computer circuit board and wall thermostat.. no change.

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
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Posted on Jan 02, 2017

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SOURCE: btu for dometic 59516.531

59516 is a Brisk Air 15000 BTU.
Thanks for using Fixya

Posted on Mar 30, 2009

  • 534 Answers

SOURCE: my dometic duo therm brisk air RV a/c unit is not cooling the RV

clicking sound could be thermal overload on the compressor. If the compressor has gone out the unit will not cool the clicking sound is possibly the compressor trying to reset but if the compressor has "gone to ground" (winding burnt out) you will need to have the compressor replaced. Good luck on your repairs hope this helped some


Posted on Oct 27, 2009

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SOURCE: Front AC unit will not turn on

The clicking tells me the AC(hydro) power has been turned off to it. Check all breakers, and make sure if you have another switch on wall, to change from front, to back, or to both, that it is in proper position.

Posted on Apr 18, 2010

  • 415 Answers

SOURCE: looking for wiring diagram for a duo therm by

There are several models out there. Here are a couple of manuals with wiring diagrams that I believe will help you regardless of the model number. However, if they are unable to help you, let me know the exact model number and we'll search for the wiring diagram. :-)

Link #1

Link #2

Posted on May 19, 2010

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SOURCE: My Duo-therm Brisk-Air by Dometic rv ac wont cool.(The fan runs )

Usually just listening closely will give you a rough idea where to look for problem. When you have the fan on and switch to cool, (with temperature turned down low obviously) do you hear any type of "moaning" sounds from AC unit, or see lights in RV dim slightly indicating that compressor is trying to engage? Is the breaker tripping when compressor tries to engage? Do you hear a "click" from AC unit when switched to cool? If none of that happens, then I'd start thinking thermostat, or compressor relay. Normally if it's a faulty capacitor, the compressor will try to engage but will make a "moaning sound" and usually trip the breaker due to excess current draw. Someone experience in electrical should be able to test relays etc, but whoever does work on it, should be aware that those capacitors, as well as hydro in general are very dangerous to work with. The ("zap",- Shock) that you can experience from a capacitor or hydro, can be fatal.

Posted on May 30, 2010

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Hope this helps,


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