Question about Dometic Rooftop RV Air Conditioner

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Thermostat on a dometic duo therm modle #58915305 13500 btu

When turn the the ac on light flashes low voltage ad nothing runs thermostat just lights up

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  • 1 Answer

SOURCE: heat strip installation

It was quite simple, just installing the heat strip and my model only required removing the grill cover and mounting the element. The other optional installations didn't apply to my model.

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Posted on May 27, 2008

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22yooper
  • 828 Answers

SOURCE: Duo-Therm by Dometic Thermostat

Generally on most thermostats R is the power to the thermostat, W is for heating, Y is for cooling, and G is for fan operation.

Posted on May 31, 2008

SOURCE: dometic a/c, duotherm thermostat, turns right back on after it reaches desired temperture.

The thermostat usually has wire that reads the temp in the room. The wire runs through the wall and can pick up heat from the wall. Put a piece of insulation around the wire where it comes through the wall and leave only the end of the wire exposed.

Posted on Jun 13, 2008

SOURCE: dometic ac in RV

IT NEEDS A RELAY BOARD IN SIDE

Posted on Jul 25, 2008

  • 1 Answer

SOURCE: thermostat wiring for second ac unit

I replaced one unite with another and the wires are differance colors the old unites wires are red,purple,yellow,bleck and white the new one have orange,brown,cream,darkpurple,and white

Posted on Aug 02, 2008

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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.

May 27, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

I''ve been working on this thing for three weeks now. It is a Dometic Duo Therm model 57915.531 roof top ac on my rv. It will not run. This is what i have done so far: replaced the thermostat, there is...


check the compressor winding resistance from common to start
start to run
run to common
the two lowest should equil the highest
also check shorted to ground
check the capacitors the go bad a lot

May 16, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Penguin Duo therm AC bogs


Try replacing the wall thermostat with an electronic unit. It sounds like it is short cycling. If there is not at least 5 min delay before trying to restart the compressor this is what happens. Most electronic thermostats have a delay feature built in to solve this problem.

Jul 08, 2008 | Dometic Rooftop RV Air Conditioner

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