frigking rainforest

I Have a air conditioner thats letting the water from condisation run back in to the motorhome .. has anyone else incountered this one and know the fix ?

RVITASCA :angry:


Senior Member
frigking rainforest

Sounds like a may be a couple things.
1. fins, clean (take cover off to clean)
2. Drain holes open under fins (with cover off)
3. Seal is not leaking (hard to check from site it, may need to just replace it, not easy but should stop the leak, if seal is old/cracked/etc.).
4. check where it leaked to make sure it did not do any damage.
Let us know what you find was the problem..... :) :laugh: :cool:


Senior Member
frigking rainforest

It is probably the condensation is not draining from the catch pan. To correct the problem:

1) Turn off the a/c unit and open the circuit breaker.
2) Remove the plastic grill work cover on the inside of the RV at the ceiling, so that you can see up inside of the unit.
3) With a good strong light, look up into the area where the cool air exits the uint. You should be able to see the cooling coils, on the side of the air channel. At the bottom of the cooling coil there should be a catch pan, probably made of plastic.
4)Look or feel for a drain hole in the pan. It may be in a corner, or it could be a depression more to the center of the pan. Once you locate it, you probably need to clean it. If the pan is full of water it means the drain is plugged, but even if it isn't, the drain may well be partially plugged so that it does not drain quickly enough to keep up when humidity is high. That is very common.
5) Use a spray can of compressed air or some other means to blow out the drain hole, or clean it with a pipe cleaner or such. Do this carefully as you do not want to make a leak in the pan. The drain may not be accessable to you, so if not see the part following step 7.
6) Once the drain is clear it is also a good idea to wipe out the pan with a mix of bleach and water and to run some of the mix through the drain hole to make sure that there is no mold or fungus growing there.
7)Replace the grill face, turn on the circuit breaker and test the a/c unit.

If you can't access the drain from the inside, which on some units you can not, then you will have to go to the roof and remove the shroud and locate the drain pan from there. It will be under the cooling coils. On my DuoTherm units, I can locate the pan from the inside, but it must be cleaned from the outside, on the roof. But you should be able to see both the cooling coils, the blower and at least the edge of the drain pan. That should help you to locate it from above. The problem is that the condensate is not draining away from the cooling area quickly enough to prevent it building up and blowing drops into the RV. The moisture should drain out on to the RV's roof and then run off.

This is by far the most common cause of this problem.
frigking rainforest

Ok thanks for the Info I hoping your right and its not a roof seal problem .. I will have a project this weekend :) This forum is great . Thanks for the great detail I know exactly what you mean ... :approve:

frigking rainforest

Hi I finally got around to working on this I got sidetracked .. But I had to take off the pan on the roof to get to the condication drop pan .. so now theirs 2 hoses that go to the condenser in the back of unit where the fan is both them hoses were plugged tight just like bees packed mud in there :blackeye: so easy fix .. they have this puddy holding the line in place also seals around where the cooling line go in to the indoor cooling coil . black tacky puddy like stuff.
where can I get some new puddy to replace it for reassembly ..
and what kind stuff should I use to seal that pan I took off kinda looks like mortight I think .. thanks for the detail instructions your right on the money .. The united needed a good cleaning out also leaves dirt dust black goodies oo ya I was really carfull cleaning around lines and wires .. This forum is great .


Senior Member
frigking rainforest

Glad to hear that you found the putty. I had not been on the site for a time and missed your question about it. Most RV repair shops will have such products.