Duo Therm AC 620215.303 not draining water to the outside

[eldondo]

This model does have electric heat. On a 94 Newmar Mountainaire. I have had it about 10 years. No problems with this issue until yesterday after almost two years of sitting. I have the operating instructions, but, no mention of any such thing as the drain. I know in the past the removed moisture ran out somewhere and dripped off the roof. Could use some thoughts.

[eldondo]

Well, I called my friendly heating and air guy. He came out took the lid off, blew it out, blew out the condenser?. He did both of them and said he guaranteed they won't leak inside. Just less than an hour to do them both. Thanks for the answers. It was fairly simple, but, I don't like climbing up on top. I probably should never have got an RV.

[ferndaleflyer]

Sorry, I have a different DP and it has a different a/c unit. Didn’t mean to hijack this thread.

[dougrainer]

Newmar Motorhomes did not drain thru the roof to the bottom back then. They drained on the roof only. Doug

[ferndaleflyer]

I can see my drain lines from down below. I took them apart and blew them out with my compressor. Went on top and did the best I could because I can’t see where the drain holes are in the pan. When I disconnect drain hose in the bottom it seems to drain fine to that point. I blew out the down side tube and found nothing wet under the coach but it seems to not be draining there

[dougrainer]

MountainAir05 wrote:
Go up on top and remove cover and you will see drain lines, They are just stopped up, clean them out and you should be OK. Clean the old AC while up there. A every year thing. Unplug from power and gen while doing this.

2 things cause this
1. As you mentioned the drain pan drain holes clogged
2. Another more common cause on older AC units is the AC Gasket has slowly collapsed over the years and the drain holes are touching the roof membrane and cannot drain. Especially true if you have RVP/Coleman AC units which is what Newmar used in 1994.
So, you replace the AC Gasket and clean out the drain pan. Doug

[MountainAir05]

Go up on top and remove cover and you will see drain lines, They are just stopped up, clean them out and you should be OK. Clean the old AC while up there. A every year thing. Unplug from power and gen while doing this.

[Chris_Bryant]

Check out http://bryantrv.com/roofacleaks.html

Your penguin model is a bit different, but the basically are the same.