Question about Dometic Rooftop RV Air Conditioner

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Cools nicely but then quits for a while but starts cooling again after 20 minutes or so. and keeps this cycle, not comfortablel at all.

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Dirty coils/filter or low refrigerant will cause the unit to trip out on overload and shut down until the unit resets. Thats what causes the system to cycle in that manner.

The system needs to be cleaned and then the refrigerant charge can be checked properly. You may find it needs refrigerant as well.

Posted on Feb 02, 2010

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alot of machine have a max drying time of 120 minutes 20 of that will be for cooling so 100 mins hot!

the cooling cycle is usually indicated near the end of the dial in a different colour to that of the hot cycle.


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Starts and runs for 15 to 20 minutes then quites. Once it cools down you can re-start and again it will run the same cycle.


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Aug 10, 2010 | Garden

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No cycle runs longer than 20 minutes and the clothes are still dripping wet when done.


The motor could be overheating and shutting down. Does it stop mid cycle and the timer keep advancing? if so when it stops wait for it to cool down and try starting it again. If it will not start for a few min. then does it is the motor overheating.

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1 Answer

Cuts off in warm weather after about 10 miles


Don't rule out fuel pump. Had a 95 do the same, ran great when cool in morning then when it got hot in afternoon, it would quit. Wait 15-20 minutes & go again, sometimes got me home, other times a few more miles until it cooled down again. Luckily I had access to a fuel pressure gauge. Cool in morning had 49 psi, when it quit, 2 psi. Wait 20 minutes, 49 psi again. If you can drive it around until it starts to act up then run into a repair shop for fuel pressure test it will confirm it. If not, they may need it all day to monitor the fuel pressure & confirm it is pump. If your a gambler, change it & fuel filter. One thing I did get was trouble codes indicating a lean mixture, due to starving for fuel. Have you cycled your key to retrieve any codes yet?

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Thermostat ?


The Air conditioner are good only the adjustment of thermostat are the problem, select the thermostat in lower #3 you observe the thermostat will off in such time temperature reach to #3 If you full adjustment the compressor will not off.
In fan selector the compressor will autamatic off because no connection attached fan only .

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