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donnall 07-17-2004 10:08 PM

Airconditioner drain ???
The airconditioners on my MH are not draining, the condensation is running off the roof. I'm sure there is supposed to be some kind of drain tube or something. Before I climb up there and try to figure it out has anyone else had that problem? Any tips ?
I just got back from two days at a car show in Tunica Miss, very hot, lots of humidity, so lots of water running off roof. Still very fun MH trip, RV park fees only $10 a night at the Casinos :) And no I didn't win any money (didn't gamble either :cool:

TomW 07-18-2004 04:36 AM

If you can get to the ground side of the drain where it drips onto the ground, you may want to consider blowing the tube out with compressed air.


thenewkid64 07-18-2004 10:55 AM

I would pull the shrouds and check the drains. If you want to try to clean a blockage from the lines I would not use compressed air. It will just blast crud everywhere inside the AC and could cause a hidden fitting to pop apart. Use a Shop Vac with the nozzle reduced to fit in the tube. Then you will pull the debris out and if a fitting is loose it will be pulled tighter. This is how every HVAC Guy I know cleans out condensate drains.

donnall 07-19-2004 08:45 AM

Thanks for the tips guys, I'm going to try those ASAP>

59toaster 07-19-2004 10:26 AM

Somebody posted some pictures of a A/C install and the drain tube at the A/C appeared to be accessible if you dropped the difuser inside.

This may sound stupid but are these the original A/C units? A lot of replacment unit will not have the drains correct for the Airstream withouit buying a Airstream drain pan.

donnall 07-26-2004 12:40 PM

Ok, climbed up on top of the MH this weekend. Airconditioners look original. There are drain holes but no sigh of any tubes to carry the water away. Looks like it just drained on the roof. Well I guess that was OK when the rig was new, but now that's is 11 yrs old and has a few cracks in the calking it's not so good.
I've found a couple very small leaks inside, one in front and one in the rear, and the waters coming from the AC units. I know this because the rigs inside my barn and I ran the AC unites long enough to create alot of condensation.
(This is the south, there's lots of humidity here:)

Sooooooo, here's what I've decided to do.
1. Scrape and recaulk the whole rig.
2. Make some drains out of 1/2 clear flexiable tubing, and run those to the outside edge of the MH, tie em off with zip ties and see if that works.

Anyone else had this problem?
Or, anyone got a better idea? Fix ? Suggestion?


thenewkid64 07-26-2004 12:45 PM


Originally Posted by donnall
Or, anyone got a better idea? Fix ? Suggestion?


Instead of trying to solve the problem with a tube of sealant, I would replace the foam gaskets that are the source of the leaks. Jot down the model numbers, normally on a plate readable form inside with the inner diffuser pulled, and order 2 new gaskets.

They should not be expensive and will offer many more years of service that the sealant route. The AC units are held to the roof by 3 or 4 bolts that can be removed from the inside. Then they lift off. R&R gasket and reinstall. This is what I would do if I was in your position. Especially since you have an indoor facility to do it in. :D

59toaster 07-26-2004 01:08 PM

I am really surprised there are not some other drains to route the water out the bottom of the coach. Airstream has been installing those drain lines on every coach starting about 1964 as part of the prewire.

Are you sure the drains you have found are not the overflows and the main drains are possibly plugged up somehow?

Hopefully Andy from Inland will catch this and make coment. He would probably know better then anybody else.

74Argosy24MH 07-26-2004 01:24 PM

I would reseal the roof and get new gaskets for the ac units. The flat roof motor homes just drained on the roof and ran down the sides, if you have leaks from the ac units rain will be getting in there also. 11 years and it is about due, especially in hot climates.


donnall 07-26-2004 02:08 PM

Thanks guys, First I'll check to see if there are other drains. If not I'll go ahead with the home made tubes. And yep it's due a recalking as the leaks are at the front & rear corners of the MH, where you can see very small cracks in the calking. Thanks for the help.

I'm still open for more suggestions or comments, and all will be appreciated.

I love this RVings stuff !!!

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