Question about Dometic Rooftop RV Air Conditioner

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Duotherm compresor and fan problems

Model 620215 low profile and 595 quick cool onsame motorhome ,95 nemar country aire,both units the fan slows down for about 1 to2 seconds about 77 volts on fan lead, comes right back up to speed ,does not stop,happens on all speeds! also the quick cool, the fan and compressor stops compleatly for about 1 to 5 seconds, fan comes on and compressor restarts after the time delay a relay clicks at rooftop circuit board when it starts am a electrician for 40 years all conection tite and clean voltage 115to120 volts happens on 30 and 50 amp service,ducted air w/wall stat #3104999.002 w/green lights top center hoizontal temp slide help!!! marty 630 244 4415

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Capacitors good! i installed upgrade kits $247 each from dometic problem solved thanks

Posted on Sep 12, 2008

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Have you checked the capacitors ?

Posted on Aug 28, 2008

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1 Answer

THE rEFRIGERATOR IS NOT COOLING OR FREEZING AND IT MAKES NOISE WITH THE RELAYS WHERE THEY ARE CLICKING ON AND OFF. dO NOT HEAR A FAN BLOWING OR THE UNIT MAKING COOL AIR.


I did not see a model or brand on your request but i'm going to guess that ist a G E and the clicking rellays are a common noise when the program board has failed . the unit will shut down / as the board controls the compresor and fans / heater //defrost cycles . if more help is needed i need the brand and model # .. hope this helped mm feed back pls and thanks for ysing fix ya .

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The fan on my duotherm a/c doesn't work. I can hear the compressor come on but the a/c doesn't blow any air. There was a fairly loud pop when it quit working. Am I looking at replacing a condenser or relay...


SOUNDS LIKE A OVER HEATED CONTROL SWITCH   THE SWITCH THAT CHANGES HIGH, LOW FAN, HIGH COOL, LOW COOL. REMOVE INSIDE CEILING SHROUD AND LOOK AT SWITH FOR BURNT TERMINALS OR LOOSE WIRES TURN OFF POWER FIRST AT BREAKER.

Apr 18, 2010 | Dometic Rooftop RV Air Conditioner

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Blows cold but shuts down no freeze up


Check the capacitor. It should be a dual capacitor , runs both compressor and fan. This sounds like your problem only because both the compressor and the fan go out together. Good Luck Hope I helped

Dave

Sep 16, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

1994 Carrier 58 PAV


sounds like the relay for the unit may be bad, usually if a blower motor goes it stops or has a very loud humm and only goes slow

Aug 03, 2009 | Heating & Cooling

1 Answer

The a/c unit cooling fan shuts down shortly after unit kicks on.


If a fan motor quits working during a cycle it usually means that the thermal protector is turning it off. If you had an amp meter on it, you would notice that it is exceeding the listing on the nameplate, Nine times out of ten this is irreversable, the motor needs to be changed. Sometimes if there are oil ports on the motor, you can add a few drops of zoom spout oil and that does the trick. But usually the motor is already damaged. Good luck.

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1 Answer

I have a DuoTherm unit on my 1989 Cross Country that only runs in the "low" position and shuts off after about 5 minutes. Won't come back on until about an hour later, then runs for 5 minutes or so...HELP!


Is the unit ducted with a wall mount thermostat? If so, then I would say that you need to check the thermostat. Remove the face plate from the thermostat, there should be 6 or 7 wires, depending on the model. With the thermostat set to high/cool, check for power at the yellow wire and the blue wire. Yellow is the compressor terminal and blue is the high fan. If you have no power at the blue terminal, then you have a bad thermostat. If there is power there, then you need to access the control unit in the air conditioner (remove inner shroud). Check for power at the blue wire at the control unit. If there is power, then you have a bad control unit. The unit is shutting down because it is freezing up in the low fan speed position. You can use a jumper wire on the thermostat to go from the +12 terminal (red wire) to the Hi Fan terminal (blue wire) and also the fan terminal (Either tan or orange, depending on the model). If the fan comes on, then you have a bad thermostat. If not, then you have a bad control unit or the high speed in the fan motor is out.

Hope this helps,

Jeff

Jun 30, 2009 | Dometic Rooftop RV Air Conditioner

2 Answers

My dur therm air conditioner fan turns on but compresor does not


it could be the (LP) low pressure switch which would shut the unit down

Jun 30, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

DuoTherm compressor starts but will not continue to run


check condenser fan if running. it will make compressor comes on and off if broken

May 31, 2009 | Dometic Rooftop RV Air Conditioner

2 Answers

Duo Therm Quick Cool A/C fan motor cycles from low to high


sounds like the motor is either wired incoirrectly and getting 1/2 power all the time or it is going to ground. check out the woiring real good and duse your ohhm meter to check for gounds.

Dec 20, 2008 | Dometic Rooftop RV Air Conditioner

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