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The Air Conditioner on My RV is Leaking Water inside the RV

by Bill
(Macon, GA)

The Air Conditioner on My RV is Leaking Water inside the RV

The Air Conditioner on My RV is Leaking Water inside the RV

The Air Conditioner on My RV is Leaking Water inside the RV
The Air Conditioner on My RV is Leaking Water inside the RV

I have a 1998 Coachmen Catalina. When I turn my air conditioner on; water drips through the filter.

ANSWER: Greetings Bill thanks for submitting your question on our Ask An RV Question Page.


Since you did not mention that your RV A/C unit is leaking when it is raining I am going to assume that the problem is that the drain pan on your RV's Air Conditioner is not draining properly and allowing the water condensation from the evaporator to leak inside of the RV rather than draining on the RV's Roof like it should.

This problem could also be caused by a dirty evaporator coils. Either way you are going to have to open up the Air Conditioner to fix the problems.

If you are comfortable with going on the roof of your RV you can check the evaporator and the drain pan on your RV's Air Conditioner. To do this you are going to have to remove the shroud on the Air Conditioner and also remove any cover that is attached to the evaporator. These covers are normally held on with several screws.

Once you access the drain pan, check the drain pan for any blocked drain holes. Also check to make sure that no one has sealed around the drain holes of the Air Conditioner, thinking they were fixing a leak.

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Take a look at the coils on the evaporator; if they are dirty use a product like Formula 409 Cleaner to thoroughly clean the coils.

If after you have completed the steps outlined above and you still experience leaking problems with the A/C running or you have had water leaking from the A/C when it rains then the problem is probably the gasket between the roof of the RV and the Air Conditioner unit itself.

If the Air Conditioner Gasket needs to be replaced I would suggest that you take the RV in and have a Certified RV Technician replace the gasket as well as inspect the roof around the A/C unit opening for any structural damage as a result of the leak.

I hope this helps.

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Comments for The Air Conditioner on My RV is Leaking Water inside the RV

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Cracked plastic drain pan causing leaks inside RV.
by: wegunterjrHarvy

Looks like there is a way for the condensation to get from the plastic drain pan down into the metal drain pan (on the inside where there is no access to the drains. This puddle of water get's pooled and then blown around inside causing the water to drop onto the A/C control box (which probably shouldn't get wet) and then down into the coach.

I see a crack in the plastic drain pan (actually in the drain hole), but then it goes under the coils and cannot tell. Any suggestions? Can it drain from the inside?

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AC Leak
by: Randy

My AC is leaking but not from the rain and after it cycles on and off two or three times it stops leaking and suggestions

Randy

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A/c. Leaking
by: Brenda

Leaking inside when I run my air. Where ard the drains located on this A/C. How do I clean it???????
Brenda

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ac leaking on bed when raining
by: Mark

I also have a problem that when it rains and my rear ac is running water drips onto the bed. This only happens when it is raining and the unit is on and the water drips down through the air ducts. If it rains and I turn the ac off then no leaks and no leak when its not raining. A friend with a similar coach has the same problem. This is a colman ac unit on a 2012 Winnebago tour. Also this problem is only on the rear ac unit the other 2 are fine. My friends problem is exactly the same.

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a/c
by: bill

While you are doing this check the a/c mounts that hold it to the roof. Some times they come loose after the a/c is installed,and never retightened there are 4 bolts just don't over tighten them.

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Mitigating AC Water Leaks Inside RV
by: Merv

Good article ... had the same problem especially in hot, humid weather. An appliance RV tech guided me to:

1) Clean the inside filters frequently. These are the meshed filters in the main outlet returns inside the RV.

2) IMPORTANT! Vacuum the condenser fins. When they get dirty (and they do), lots of bad things can happen. Open your ceiling grills. With a flashlight, observe the fins. Mine were coated with dust. I used a vacuum with a small brush and carefully removed the built up dust and dirt. The keyword here is careful!

When checking and cleaning as necessary about every 30 days or so, I have had no AC leaks inside the RV. Hope this helps.

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