Question about Dometic Rooftop RV Air Conditioner

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Rv air conditioner leaking

Have had problems with duo therm air conditioner leaking inside camper. water dripping/pouring into floor from vent. Just replaced board and gasket...still leaking

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  • giovo45 Jul 17, 2008

    My dometic also leaks inside the motorhome. I see water dripping off the side of the RV, but when I turn the A/C unit off, the water gushes off the side of the RV.

  • Anonymous Jul 18, 2008

    condensation leaking

  • mommy to 4 Jul 19, 2008



    we are camping in Stone Mountain,Ga. AC has been woring fine for the last week, but this evening it started to drip when it was running. when the fan turned off, water gushed into the capmer. The fan turns off but the compressor (I guess) still runs and thens blows the breaker. It has,up to this point been draining outside. Can this be due to a dirty air filter?

  • tgolino Jul 19, 2008

    Water dripping inside in coach after running several hours.A/C seems to be draining outside but also drips inside. Dealer replaced the gasket but still leaks.This a/c is installed on a class B unit. Sometimes after the unit is off while driving and applying the brakes water again drips in. The pan was checked with no cracks.I notice when I turn the unit off a big push of water comes out the outside.

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I have the same problem....it is a negative pressure problem holding water inside the unit until it overflows the pan and runs into the duct system. why this occurs....I don't know....I cant find a problem with my air return, but as soon as you turn in off, the water comes gushing out the drains on the unit. I resolved this....temporarily....by twisting up a paper towel into a wick, and placing one end up into the drain tray, with the other end lying well out into the exterior case. This lets the water wick out and keeps the tray drained. I don't understand the problem and don't know what the permanent fix will be, except maybe cutting a hole and placing an intake vent directly below the unit.

Posted on May 11, 2009

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  • Master
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In each of these cases I would check for proper connection of the return air vent to the A/C from below. Static pressure from insufficient return air could cause negative pressure to hold back on condensate drainage. when the unit is shut off the pressure becomes equal allowing water to drain. Also check air filter and clean if found necessary.

Posted on Jul 18, 2008

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  • Dometic Master
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It probably a dirty coil. when the air passages are restricted it increases negative pressure. residential units require a trap on drain line to overcome drain issues.

Posted on Jun 20, 2015

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1 Answer

I have a duo therm model 57915 522c1 air unit on my camper. Turned it on and was working fine. Then it shut down. Doing nothing now. Any ideas?


water draining from condensate hole ??? if not its shut off on high water level (you don't want water dripping into your nice camper right ?)


bees are my nemesis on these they love to build mud nests in the drain holes and stop em up !!

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Duo therm 57915.331 not cooling


make sure fan on auto and on cool if ok bad cooling unit

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I have a jayco pop up camper with a Duo-Therm BriskAir roof top a/c. im having problem with it leaking water inside of the camper? Is there a drain hose? Or wat do u think is wrong?Thanks


Yes there are drain holes in base of upper unit (on roof), which may be plugged. Couple of questions though to see if we can better troubleshoot this for you.
-Do you remember seeing water (condensation) running off roof before when AC was used?
-Have you cleaned filter inside at ceiling lately?

May 17, 2011 | Dometic Rooftop RV Air Conditioner

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My dometic duo-therm freezes up and does not drip water. What is the problem?


Hi,
Either the unit is low on charge or the fileter/coils are plugged with dirt and decreasing the air flow so that is freezes

heatman101

Mar 26, 2011 | Dometic Rooftop RV Air Conditioner

1 Answer

I'm purchasing a generator to power the Dometic Duo Therm Brisk Air A/C unit in my camper. How many watts does it draw?


You will need at least a 5000 watt generator to run that and a few lights etc... for the camper.

heatman101

Aug 18, 2010 | Dometic Rooftop RV Air Conditioner

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The Duo-Therm AC in the motorhome has started leaking from the inside after approx. 1/2 hour of use. What could be the problem?


More than likely water is pooling on top of the rv and leaking thru a crack next to the unit. The other problem would be the drain hole is plugged you will have to remove the top to ck. good luck

Aug 10, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

Duo Therm dripping water in camper when shut off. My Dometic Duo Therm Ducted AC drips quite a bit of water when shut off after running for several hours on hot humid days. The condensate lines are open....


Remove the filter at ceiling and run the AC on cool etc, and see if you can feel cool air leaking across to return air inlet where the divider between cold and return is. Check along all edges, etc for any cool air . Careful of wiring, but you should be able to get hand in there and feel especially around the edges where it should be sealed tight. Quite often a leak in that area causes cold air to enter return air and causes excessive condensation. Another thing to check is look way up inside opening for return air, with a flashlight and see if any dirt/dust on coils and fins of evaporator, and if so, needs to be cleaned off with a vacuum, and brush attachment. Let me know what you find.

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Replacement Fan Motor


Try Johnstonesupply.com. Use the information you provided above.

May 06, 2010 | Dometic Rooftop RV Air Conditioner

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