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Old 11-17-2010, 01:29 PM   #1
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Air Conditioner Roof Leak

We picked up our spanking new 23' Flying Cloud last October and no sooner got it home than found a puddle on the floor below the AC. Looked up to see rain water dripping out the AC vents. Took it back to dealer who re-caulked around the AC and thought that fixed it. Last week we drove thru a major rain storm and found the interior soaked again, dripping thru the AC. Anyone had this depressing deluge?
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Old 11-17-2010, 02:23 PM   #2
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ac leak

i had one that leaked there one time, was checking and found the mounting bolts had worked lose. take the inside shroud off and check.
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Old 11-17-2010, 03:31 PM   #3
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You mean to tell me that you just bought a 2010 AS and were towing it home from the dealer and it has a leak? Take it back and buy yourself something from another dealer!
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Old 11-17-2010, 05:10 PM   #4
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I think if that happened to me, I would just sit down on the side of the road and cry.
Then immediately get up and take it back to the dealer....
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Old 11-17-2010, 05:42 PM   #5
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Quote:
Originally Posted by BillB44 View Post
We picked up our spanking new 23' Flying Cloud last October and no sooner got it home than found a puddle on the floor below the AC. Looked up to see rain water dripping out the AC vents. Took it back to dealer who re-caulked around the AC and thought that fixed it. Last week we drove thru a major rain storm and found the interior soaked again, dripping thru the AC. Anyone had this depressing deluge?
I can't believe that your 'dealer' used any type of SEALANT on a Dometic roof air conditioner. THIS IS A BIG NO NO !.

I'm a factory authorized Dometic service center and have never used sealant of any type to mount a roof air, even on Airstreams.

If the drip tray that Airstream uses is not properly positioned on the roof, or the A/C unit is not properly positioned on the drip tray, or the bolts are not tight (the bottom gasket must be compressed to 50% of it's original thickness), then you have a problem THAT NO AMOUNT OF SEALANT WILL CURE!!!!

I suggest that they either do it right or you should find another Airstream dealer that will fix it right.

I would also call Airstream factory service and tell them about your experience. I'm sure they will be quite interested!!
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Old 11-17-2010, 06:02 PM   #6
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Sad. I would definatly request another one. And if the dealerships answer is the put sealant on a dometic A/C, I have to agree, you need to find yourself a different dealer. I just put a new one on my 58' flying cloud and the salesman made it VERY clear not to use any sealant. Its a compression foam gasket.
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Old 11-17-2010, 06:48 PM   #7
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Quote:
Originally Posted by BillB44 View Post
We picked up our spanking new 23' Flying Cloud last October and no sooner got it home than found a puddle on the floor below the AC. Looked up to see rain water dripping out the AC vents. Took it back to dealer who re-caulked around the AC and thought that fixed it. Last week we drove thru a major rain storm and found the interior soaked again, dripping thru the AC. Anyone had this depressing deluge?
Could be the drain tube got clogged? What a stupid move on the part of the "pros". I agree, NO FREAKING CAULK!
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Old 11-17-2010, 07:02 PM   #8
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I had the problem this past year on my 2000. The drip pan under the AC was cracked. AC unit had to be removed and new drip pan installed. Fixed the problem.
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Old 11-17-2010, 07:38 PM   #9
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I've had both our Coleman roof airs replaced with Dometics, my mechanic explained to me, "we use both our fork lifts when installing them so we don't screw up the pans and seals on Airstreams."
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Old 11-17-2010, 07:56 PM   #10
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Mounting bolts were very loose on my Ac and I had a leak. Gasket dried out, bolts came loose from travel, or not made tight at factory? Your guess is as good as mine.

Just need a heavy rain here at my winter spot in Tx. to see if the leak has been stopped. My fingers are crossed.
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Old 11-18-2010, 03:19 PM   #11
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Great feedback everyone, thanks a lot. Small clarification: this was October '09 when the leak appeared on first drive home from the AS dealer. Yes, was very depressed. Took it back right away and dealer did, indeed, caulk it. Seemed to solve the problem; they test-hosed it down and no leaks. Fast forward to October of this year (after several miles and trips) driving thru major rain storm: water all over inside of the 'Spud again; even soaking the dinette. Dripping from and thru the AC venting. Depression returns. Called dealer in Spokane (we're in SoCal right now) and he referred us to Airstream. They were good; gave us name of a SoCal Service Center to bring it to, no questions asked. Now--thanks to you all--I'll be armed with more info and can talk semi-intelligently about the AC pan, mounting bolts, foam gasket...and NOT just adding more sealant!
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Old 11-24-2010, 02:27 PM   #12
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I can't believe that your 'dealer' used any type of SEALANT on a Dometic roof air conditioner. THIS IS A BIG NO NO !.

I'm a factory authorized Dometic service center and have never used sealant of any type to mount a roof air, even on Airstreams.

If the drip tray that Airstream uses is not properly positioned on the roof, or the A/C unit is not properly positioned on the drip tray, or the bolts are not tight (the bottom gasket must be compressed to 50% of it's original thickness), then you have a problem THAT NO AMOUNT OF SEALANT WILL CURE!!!!

I suggest that they either do it right or you should find another Airstream dealer that will fix it right.

I would also call Airstream factory service and tell them about your experience. I'm sure they will be quite interested!!
I guess caulking on an AS AC is NOT a no-no. Here's the latest word--if anyone cares--on the real low down, courtesy of my AS Dealer:

"Airstream is one of the only manufacturers I know of that installs the A/C unit on a specially made drip pan so the condensation that runs down the outside of most trailers, leaving a dirt trail, does not happen on an Airstream. The proper way to achieve a water tight seal on this pan is with caulking which Airstream does use on the Air Conditioner installation. Dometic does not recommend it on SOB's (Some Other Brand) installations. However the Airstream installation is a bit different and does use caulking. On inquiry to Airstream factory, the Sr. Service rep said they've been caulking the AC pans since he's been at Airstream, over 22 years."
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Old 11-24-2010, 05:21 PM   #13
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I guess caulking on an AS AC is NOT a no-no. Here's the latest word--if anyone cares--on the real low down, courtesy of my AS Dealer:

"Airstream is one of the only manufacturers I know of that installs the A/C unit on a specially made drip pan so the condensation that runs down the outside of most trailers, leaving a dirt trail, does not happen on an Airstream. The proper way to achieve a water tight seal on this pan is with caulking which Airstream does use on the Air Conditioner installation. Dometic does not recommend it on SOB's (Some Other Brand) installations. However the Airstream installation is a bit different and does use caulking. On inquiry to Airstream factory, the Sr. Service rep said they've been caulking the AC pans since he's been at Airstream, over 22 years."
I still can't believe that Airstream uses the drain pan for their A/C installations! EVERY OTHER RV MANUFACTURER who uses the Dometic roof airs use their 'drip kit' which consists of 2 cups that are placed under the drains and a hose mechanism that connects the cups to the inner drain tube that they all have. It also includes a second gasket to provide the clearance required for the drain cups which conform nicely to the roofline of an Airstream.

I have installed over 100 roof airs over the years on large diesel motor homes using this technique WITH NO SEALANT and also on a few Airstreams. NONE HAVE EVER LEAKED!!!

And BTW, these are foam gaskets and I have never seen one 'dry out' as a previous poster mentioned.....even in 20 year old units.
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Old 11-24-2010, 06:00 PM   #14
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[QUOTE=lewster;920500]I still can't believe that Airstream uses the drain pan for their A/C installations! EVERY OTHER RV MANUFACTURER who uses the Dometic roof airs use their 'drip kit' which consists of 2 cups that are placed under the drains and a hose mechanism that connects the cups to the inner drain tube that they all have. It also includes a second gasket to provide the clearance required for the drain cups which conform nicely to the roofline of an Airstream.

QUOTE]

There appear to be conflicting opinions concerning the correct method of installing an A/C unit in an AS. Has anyone seen a unit being removed and observed what the factory actually does on this type of installation?
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