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Old 01-18-2015, 06:07 PM   #1
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Dometic Penguin condensation drain leak

I need some advice and help. I'm renovating my '96 34'er, and have a condensation leak from the air conditioner. The A/C is a Dometic Penguin, the condensation pan under the A/C leaks at the barbed fitting. I'm sure this is a common problem, as a friend has a 28' with the same problem.

Is there a simple way to do this without removing the A/C. The actual leak in mine is where the barbed fitting goes into the condensation pan. I think the right adhasive would solve the problem, perhaps silicone?

Help and advice is welcome. I searched for a thread that deals with this problem, but the search came up with nearly 5,000, and I do not have the time, nor inclination to go through them all.

This has got to be a very common problem, I don't understand why someone hasn't made an aluminum pan to take care of the prroblem

Thanks,
Larry
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Old 01-18-2015, 06:57 PM   #2
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I used JB Weld
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Old 01-19-2015, 07:37 AM   #3
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Quote:
Originally Posted by dznf0g View Post
I used JB Weld

Rich,
Thanks for the suggestion, I've used JB Weld on other applications. I wonder if they have a product specifically for plastics? When I make my daily trip to Home Depot, I'll check..

Larry
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Old 01-19-2015, 08:59 AM   #4
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Old 01-19-2015, 11:43 AM   #5
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Actually, I need to expand my response. I used JB Weld in a small amount by gently opening the crack and working it in and providing a small coat over the crack. I then used polyurethane sealer (Sika, I think) to seal the hose on and cover the area. I used JB Weld exclusively over another crack that appeared in the pan, further away from the drain fitting. JB Weld works fine on plastic, just rough up the area with fine sandpaper and use as usual.
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Old 01-19-2015, 12:50 PM   #6
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Here's a marine product that may do the trick:

Marine Tex, epoxy resin, adhesives, silicone grease, engine treatment, cleaner, repair, bond, fill, seal, fiberglass, aluminum, plastics, Starboard, wood
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Old 01-20-2015, 07:54 AM   #7
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Thank y'all for your ideas and suggestions. I talked to Craig at Woodland Travel Center in Grand Rapids, MI. They use JB Weld for this problem, so I decided to go with it. Interesting, where my leak is, where the barbed fitting goes into the pan, the fitting connection failed.
I used a popsicle stick to get the epoxy around the fitting connection. It was cool enough in the AS that it took considerable more time to cure than normal, and the epoxy flowed very nicely around the problem area.
This morning, I'm going to give it another "coat" and that should give a thick enough coating for strength. Hopefully, the problem is solved.

Larry
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Old 01-31-2015, 09:20 AM   #8
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Guys, I hate to be a pest about this leak, apparently, there is more than one. The JB Weld worked fine for the barbed fitting/condensate drain problem, however, when it operates on ither the A/C, or heat pump modes, I have condensation running over the roof, and down the sides of the trailer.
There is water draining out of the condensate drain tube, so I'm fairly sure it's not plugged.
I've been trying to avoid having to remove the A/C, but I'm reaching the end of my knowledge bank.
I also have condensation coming out of the hole where the drain tube goes through the aluminum extrusion that forms the roof. This condensation is also seeping to the interior of the coach from the from the aluminum interior ceiling directly under the grommet where the drain tube goes through the extrusion.
I'm wondering if there may be a chance that the ABS drain pan may have a crack, or hole, where I can't see it?
At this point the interior of the coach is gutted, and I've gotta find the source of this leak before I start with the interior. Right now, the only thing I've got done is the new vinyl flooring...
Thanks again for your help.

Larry
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Old 01-31-2015, 09:49 AM   #9
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Step one - blow some 5 psi air up the condensate drain hose by the wheels. Mine was partially occluded, had the same symptoms yours has and blowing it clear solved the problem.

Mike
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Old 01-31-2015, 09:52 AM   #10
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Blow out the drain tube from the bottom to the top just to make sure it's not partially plugged. I mean, you came this far might as well make sure. Other than that I'm out of ideas too!
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Old 01-31-2015, 09:54 AM   #11
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I'm too late, must have been typing while n2916s was sending his response.
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Old 01-31-2015, 12:00 PM   #12
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N2916s and Bluto,
Thanks for the response, but that was the first thing I did about 2 or so weeks ago. I started with low pressure, (5 psi) then worked up gradually to 75 psi, believe me, there is no obstruction the the condensate drain hose.
I think I'll call Airstream Monday morning and ask for any ideas they might have. I'm almost totally convinced the A/C will have to come off and a new drain pan will be in order.
I hope I'm wrong.....

Larry
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Old 01-31-2015, 03:57 PM   #13
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I hate to say it but I think you are right and the unit will have to come off. Annoying but not horribly difficult.
Keep us updated as the mystery is resolved.

Mike
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Old 01-31-2015, 05:36 PM   #14
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Quote:
Originally Posted by n2916s View Post
I hate to say it but I think you are right and the unit will have to come off. Annoying but not horribly difficult.
Keep us updated as the mystery is resolved.

Mike
Mike,
I did one last check on this, I took the drain hose off of the barbed fitting, and blew air through the hose from the top down. I ran it up to 125 PSI, my wife held her hand under the drain tube, and only air came out. Then I took a piece of wire, and ran into the barbed fitting, there is no obstruction.
So the A/C has to come off, and we have to find out where the leak is.....
Another day in the upgrading of the '96 34 footer....I guess we can say this is a "character building" experience....
Thanks for all you guy's help, I'll let y'all know what the problem was when we find out.

Larry C
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