Question about Dometic Rooftop RV Air Conditioner

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How do I clean out the vents in my RV Dometic roof ac?

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Take it off,the plastic inside vents, with soap water and a hose wash it.  Outside condendor and inside evapator, making sure the drain is open and outside shroad removed, brush off fthe loose stuff. wet both units, put liquid dishwashing soap on both. Spray then through , with a hose untill they rince clean.  While up there. Oil the motor if possible.  Keep the drain clear and open,making sure none of the water is getting into the RV.

Posted on May 10, 2009

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Posted on Jan 02, 2017

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Dometic roof top rv ac not cooling


sounds like it is low on freon have someone check with gage and add more if nedded.

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Jun 25, 2013 | Dometic Rooftop RV Air Conditioner

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RV AC is working fine, but the water is leaking from the ceiling Where is the drain tube on the unit, The AC unit is a roof type, Duo Therm serial # 43404934, Part # 3105459


Normally, the condensate will drain out of the unit onto the roof and off the edge to the ground. Remove your cover inside (probably 2 screws) and tighten the 4 bolts you will find inside. If they are tight, go to your RV supply place and get new roof gasket. Remove the AC and insert the new gasket and resecure the AC to your roof.

Thanks for your question @ FixYa.com

Jul 26, 2011 | Dometic Rooftop RV Air Conditioner

1 Answer

13.5 Dometic rooftop rv ac design has changed since I purchased 2006 Monaco Camelot rv. The collection cups leading to the drain line do not fit well on the roof seal and a good seal is hard to achieve. If...


I've not run into the problem your having yet, so I will apologize up front for asking you to furnish more information. These drain cups that I assume are little round pieces attached to the base of the unit where it meets the roof, were not common on dometic, but were common on Coleman AC units. Those are the outlets for condensation to the roof anyway, are they not?
Also, as far as gasket goes, no I wouldn't recommend using 2. We were always advised by manufacturer to compress gasket to half the original thickness when installing either Dometic, or Coleman (RV Products). Coleman at one time, had tabs under gasket that when gasket was compressed, and they touched the roof surface inside, that was far enough, which was approximately half the original thickness. Believe it or not, over-tightening is more likely to cause a leak. Stick with half original thickness, or close to it.

Jun 26, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

How to remove the complete roof top ac unit , 1980 GMC Tioga RV


Shut off Any AC power (hydro) to it, remove ceiling assy (inside part) and you'll see 4 bolts going up through lower assy, and into base of upper assy (roof unit) . Remove those 4 bolts and any wiring harness connected from lower to upper unit. Lift it off. If your just replacing the upper assy, leave hydro wires hooked up to lower assy , and let it hang, while you clean surface on roof for new install. Re-install 4 bolts and tighten equally until gasket is approx 1/2 thickness it was before tightening. Re-install wiring harness plug in to lower unit etc. If not replacing, but removing entire assy (upper and lower) be sure to Marette and tape hydro wires as well as any 12 volt wires, and tuck away safely. Install a vent on current opening , or whatever you choose.

Sep 28, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

The ac works great except the vents have no air coming out of them just the main vent


You will have to go into the Roof space and see if the Distribution flex pipe is detatched from the conduit.
Regards,DT

Aug 29, 2009 | Dometic Rooftop RV Air Conditioner

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