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Water leak When it rains, I get copious amounts of water leaking from the ceiling of my travel trailer. I assume there is some sort of gasket seal under the a/c. How would I go about replacing that?

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If you remove the air grill for the inside part you will find four screws which when tightened compress the seal gasket under the outside to roof. It may be a case of these screws being somewhat loose.

Posted on May 11, 2008

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Our penquin dometic air conditioner in the bedroom pours leaks lots of water when the unit is on during rain storms. Water leaks into the ceiling and also out the unit.


Sounds like base gasket at roof is loose or defective to start with. Try removing ceiling assembly enough to tighten 4 bolts that secure roof unit to inside bracket. Do not compress too much, just snug them all evenly and see if water slows or stops. If not, you will have to remove upper unit (roof) and replace gasket and re-secure but don't tighten to excessive, only compress gasket approx half of original thickness. Also make sure upper unit is aligned properly with opening of roof.

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I have a travel trailer with a coleman 7300 roof top ac unit. the unit will blow cold air but water leaks thru the plenum. i was told by the previous owner that it needs a new seal. i would like to fix it...


If it's leaking inside where filter cover is, then real good chance the drains being plugged is the only problem. If water (condensation) not running off roof when operating in cool mode, then I'd bet drains, which are located under unit on roof, and you should see them sticking down like buttons. They have a hole in side that needs cleaning with a pipe cleaner or similar to open them up. If need be, shut off power to unit and remove top cover on roof unit and look for the drain holes in base, and clean them out. If water comes in while raining, but AC not running, then it's gasket. That is remedied by removing ceiling assembly (just screws) and 4 bolts that pull/hold the upper and lower assemblies together, unplug wiring to upper unit, and simply lift it off, change gasket and re-install. Tighten those 4 bolts equally when gasket is aligned properly over hole, only until gasket is approx 1/2, original thickness. Plug harness back in and your done. (about an hours work.) Only other thing that may be wrong is styrofoam drip tray for cooling unit, under cover on roof may have a crack , allowing condensation to leak in. If that 's the case, you can try to find a sealant compatible with styrofoam to seal those cracks.

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ok this unit should have a silicone seal around the pan so water does not collect under it if old silicone is worn away scrape old silicone away and redo new silicone around unit so it sits properly make sure all the water is gone before sealing because you run the risk of mold build up under it; let it dry or help it dry thats up to you

but would like little more info on what this is on

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