Question about Dometic Rooftop RV Air Conditioner

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Roof duotherm ac not working

Circut board not working how to wire direct bypassing circuit board

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Do not do you will burn up compressor and cause fire making lots of heat and not cool

Posted on Aug 01, 2009

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How do i bypass the furnace and still use the duotherm 57915.531


Do you have the digital thermostat? You can tell the thermostat you have no furnace. You should be able to disconnect power at the furnace, but the 12v power for the circuit board is provided by the furnace circuit on some systems so make sure you disconnect the wire going to the furnace and leave the wire feeding the circuit board.

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You have 2 black wires and 2 white wires One pair from the power ,and the other pair from the speed control board 2 wires go to the circuit breaker Which 2?


power is ac so there is no polarity problems, one power to circut breaker, one to the other location. Only one to breaker

Aug 22, 2011 | Saws

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I have a Duo-Therm roof top. The compressor wont shut off. When the stat is satisfied the fan stops but not the compressor. I pulled the metal control box but didnt see a real set of contacts. Where are...


Trace the wires from the compressor back to where they come from. They should be coming from a contactor or from the circuit board. It's possible the relay is built into the circuit board (it will look like a little black box on the board. Let me know what you find.

Jun 08, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

Electrical Short in Printed Circuit Board.


Hi, do you know what these wires were for? You can bypass the board, but if the wires are for lets say the blower motor and you bypass and put them to direct hot legs, you will run all the time, or what ever shorted the block in the first place must have a short. Its probably in the wires at this block and if you apply it to 120 volts it may fry again. I would follow these wires back to see what they run first. Yes, it can be done.
Shastalaker7

Jun 08, 2010 | Amcor PLM-14000E Portable Air Conditioner

1 Answer

I have a suburban lp furnace and duotherm air/heat pump roof unit. duothern thermostat. 20 amp breaker kicked ( reset breaker) & furnace quit. NOW furnace fan comes on but does not light, and the front...


I'm not sure what the problem may be but you could try calling All Seasons RV Appliance Parts & Service. There number is 1-800-344-0673 they have helped me in the past. That and there tech calls are free so it wouldn't hurt to give them a call.

Jan 23, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

I a LG 22860sw refrigerator ERROR CODE DH


The main Pcb as well as the defrost thermistor are in the circuit as well.
The thermister is attached to the evaporator with wire ties and connects to the roof of the freezer behind the fan assy.

I have seen the thermister connector pull out of the connector at the top of the freezer beacuse the wires were to tight. Remove some of the wire ties and reinstall the connector.

Jan 12, 2010 | LG Refrigerators

1 Answer

Duo Therm AC/Heating not working at all after tripped breaker.


I had to get on the roof of mine, remove the cover and manually spin the fan. Add a little oil to the shaft where it goes thru the bearing. All of this is done on the roof side. Mine required this procedure every spring. Duotherm realizes they had a problem and have since corrected it but they don't deal with all of their customers that had the original problem.

Jul 20, 2009 | Heating & Cooling

1 Answer

Ac Problems


You must have too many things running on that circuit. Check your connection to the power box.Loose connection on the receptacle can cause the breaker to trip or too many things running on the same circuit. If the breaker is old it might need to be replaced.

May 10, 2009 | Dometic Rooftop RV Air Conditioner

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