Question about Dometic Rooftop RV Air Conditioner

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Red liquid dripping from roof of rv. Coming from AC where water usually runs.

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  • jsd3024 Jul 30, 2009

    the liquid is red like transmission fluid not rusty water.

  • jsd3024 Jul 31, 2009

    Thanks for the help! The unit is only three years old(Carrier). If it is freon, I haven't been able to find anyone that will repair one. They always say it's a "closed" unit and no no way to service. The unit is running normally so far!

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Check that the drain pan is completely draining. If the drain is partialy plugged, you may get rusty water from the unit when the water level gets to the support brackets.

Posted on Jul 30, 2009

  • maint chief Jul 31, 2009

    Is the unit running normally ? If it is then the red color may be red algae growing in standing water in the pan. A little disinfectant like Lysol will cure this.

    If the unit is not putting out cold air then the red may be dye check tracer from a freon leak. In which case you will need a serviceman to exhaust the unit, repair it then recharge it.

    Maint chief

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Hi, the roof top air conditioner drain keeps dripping on the door of the camper. is there any way we can adjust a hose or something to redirect the drainage? the camper is Coleman Pop up and the air...


Re: re-directing the water dripping over door ! Stop at RV parts store and get yourself a tube of "Dicor" self leveling sealant. It's recommended for rubber roofs, but works well on most roof surfaces.
Then I simply run a 3/8" bead of "Dicor" across wherever the run-off from AC is coming down, and re-direct it so the run-off comes off roof elsewhere. Don't try to smooth it out or anything, as I said, it is self leveling, just use a caulking gun, lay a bead about 3/8" and allow it to set for a few hours if you can. Make sure you pick a time where AC is off for a couple hours so (run-off) water isn't present. You"ll see the path (stain) on roof where it travels to guide you for redirecting. It's a simple fix, and no screws or nails required. Use the rest of the Dicor to fill in any gaps, cracks etc you see on sealant on the roof while your up there, but clean those before applying. If you can wipe your intended path down with some mild cleaner prior to applying bead, it will help it stick better as well. Even a little dish soap in water will do, just be careful, it gets pretty slippery when soap on there. Quick rinse with water then dry with rag, or let the sun dry it. Actually on a rubber roof, It should be scrubbed with mild detergent at least once a season anyway.

Feb 28, 2011 | Dometic Rooftop RV Air Conditioner

1 Answer

Water dripping out of rv ac into rv.


Is it a ducted system? If yes, check that there isn't gaps between the divider that separates return air at the front, with forced(cold) air. You can usually use a flashlight and look for gaps, or even (very carefully) feel it blowing cold into the warm air return. If you find some gaps, buy some foil tape, and tape them off good and retry and see if it still happens. Some older units experienced cracks in drip trays that allowed condensation to drip inside as well. Get back to me with year of your RV, and whether it's ducted or non-ducted system, and perhaps I can guide you better on what to look for.

Jun 20, 2010 | Dometic Rooftop RV Air Conditioner

2 Answers

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they do that its normal operation, you will get varying amount depending on your location and humidity. If it is not balanced or installed right it drips in the camper.

Aug 16, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Water dripping inside camper from AC unit


Basically there are holes in the base of the AC that allow water (condensation) to run out, that may be plugged, and usually you can tell by how much run-off you have on your roof, and the stain will also guide you to where to poke with wire to unclog. Best way to be sure is to take all the screws out around base of cover & lift cover off. Just watch for bees, or wasps before you do, they like to nest in there..If all unplugged & running out good but water still coming in trailer, then you may have a cracked drain pan.

Aug 08, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

My roof top RV air conditioner is dripping water inside my RV


Check run-of on roof & see if it's been reduced lately, it may just be a plugged drain at base of unit on roof.

Jul 29, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

ROOF TOP AC UNIT ON COLEMAN POP-UP LEAKS


Does water drip out of unit on the roof while running ? If you look under the unit on the roof, you should see one or two little drains sticking down., that may be plugged up. Piece of wire or something and poke in the holes on the sides of those drains to make sure they're clear. Usually there is a plastic/nylon pan on roof unit to catch that moisture, and drain it off. Could be overflow because of the plugged drains, or I have seen the odd one crack but not too much recently, mostly back 5 yrs ago or so they had a run of them.

Aug 13, 2008 | Dometic Rooftop RV Air Conditioner

3 Answers

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Either your 14"x14" a/c gasket is lose on the roof allowing the condensation to flow into your RV or you have a cracked condensation tray under the evaporator. I'm guessing the later

JGRV

Aug 01, 2008 | Dometic Rooftop RV Air Conditioner

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