AC drain tube

[Bait guy]

Well thanks, I found where my drain tube starts, ( well sort of) I removed the air box and found where the plastic pan is hooked to a drain tube, problem is about 2 inches forward another plastic tube is there the same dia, hooked to nothing, now the question is raised which tube extends to the outside? How do find out where the "current" tube is draining. I understand if I would put some water in the pan it would drain down, but to get to that area would be a major undertaking. Any ideas what the "other" tube could be. Owners manual is really useless at this point. This is a dometic Penquin with heat strip.

[Bait guy]

Well I took a air hose and blew from the bottom and found the right hose, OK, I should be ok then, however where does this other hose go to, or what does it do?

[bfd]

I was working on the (Penguin) A/C in my '98 Excella today and I have the same setup. That is, I have that same extra tube a couple inches forward of the drain tube and was also wondering what that one does. It's just sitting there, attached to nothing, like you said.

My unit is dripping on the floor when the A/C is on. I checked the drain tube today and it's clear of obstructions. Then I thought maybe the drain tube was leaking where it connects to the barbed fitting. But after some more disassembly tonight, I can see that the fitting itself is leaking through the caulk where it's attached to the tray. I guess I'll try to add some new caulk around the fitting.

Bruce

[Bait guy]

I just a shot of air from the bottom hose and it cleared out the obstruction. As far as that "other" tube, I have not figured it out yet. I dont think "extra" caulk is the answer to your problem, it must be plugged or blocked in the tray area, more caulking may just make it leak in a diffrent area.

[bfd]

Originally Posted by Bait guy

...I dont think "extra" caulk is the answer to your problem, it must be plugged or blocked in the tray area, more caulking may just make it leak in a diffrent area.

That is a good thought and I appreciate you mentioning it. With the drain tube removed, I checked the fitting at the tray and found there was no obstruction. Then I carefully removed the old sealant from around the drain fitting with a knife. This was actually pretty easy and only took about five minutes. After that, I applied new sealant (TremPro 635 urethane, which used to be called Vulkem) and allowed it to cure. I have now tested the A/C and am happy to report there are no more drips on the floor.