A/C Water leaking out of inside vents.

[GM_LA]

Both of my Atwood a/c units are dripping water out of return vents Has anyone had this issue? 2018 FR3 DS.

[AD2]

Yes, mine also. Cleaned the removable plastic air filter and that helped. I have checked inside and out and cannot find a leak. Only happens when the fan is on high and filter has some restriction.

[DutchRv]

Yes.

Happens to me too. Installed brand new unit, still going on. Indeed restricted airflow and fan on high, the fan will suction the condensation out of the styrofoam drain gutter, that normally funnels the condensation outside and onto the roof. Trying to pitch the rooftop unit with the front slightly higher than the rear will help. Calibrating your Lippert leveling system in a way that the entire bus is slightly pitched towards the back will have the same effect.

In other words, these Atwood units suck.

[GM_LA]

Originally Posted by DutchRv

Yes.



Happens to me too. Installed brand new unit, still going on. Indeed restricted airflow and fan on high, the fan will suction the condensation out of the styrofoam drain gutter, that normally funnels the condensation outside and onto the roof. Trying to pitch the rooftop unit with the front slightly higher than the rear will help. Calibrating your Lippert leveling system in a way that the entire bus is slightly pitched towards the back will have the same effect.



In other words, these Atwood units suck.

I agree they suck! I'll give that a try and see if that helps. Thanks

[GM_LA]

Originally Posted by AD2

Yes, mine also. Cleaned the removable plastic air filter and that helped. I have checked inside and out and cannot find a leak. Only happens when the fan is on high and filter has some restriction.

Thanks!

[cavie]

Roof drains are blocked. Drain pans are overflowing. Remove covers and look for blockage.

[Jack McCord]

First remove and clean the air filter. That’s most often the problem.
After that...good luck.

[jimsara]

On my Coleman ac , ( when you remove the inside cover)the long screws that hold the ac to the roof were slightly loose. A few more turns stopped my leak. I believe you don't want to over tighten.

[dwa1000]

It turned out to be three things. The ducts can get squeezed. This will not let air flow well on high. The second problem was a cardboard block or shield needed taping to keep warm air from mixing with the cold. The final issue was a sensor to turn AC on and off was miss located. Unit would freeze up then as ice melted it leaked. Three years getting it to stop. Good luck with yours.

[Jack McCord]

You were lucky to find and correct all that. Thanks for sharing a happy ending.

[DutchRv]

Originally Posted by dwa1000

It turned out to be three things. The ducts can get squeezed. This will not let air flow well on high. The second problem was a cardboard block or shield needed taping to keep warm air from mixing with the cold. The final issue was a sensor to turn AC on and off was miss located. Unit would freeze up then as ice melted it leaked. Three years getting it to stop. Good luck with yours.

Ducts on ours are wide open. Not really duct, but rather channels cut out of the Styrofoam insulation.

The Atwoods in FR3's are really sucking condensation back in.

Originally Posted by cavie

Roof drains are blocked. Drain pans are overflowing. Remove covers and look for blockage.

No blockage...

[Kentucky Bob]

The problem is the installers broke the styrofoam condensate pan. it cant be repaired .The ac's will need to be replaced. to prove this out, remove the 6 screws holding the plastic cover to the ceiling . you will see a large sign telling installer to keep hands out of the return air plenum. look at the styrofoam pan and i bet you will see a big chunk of the side wall of the styrofoam missing. the pan is not a replaceable part and the complete ac has to be replaced. if you can look up some of my previous post, you will see pictures i posted of the busted condensate pan.

[GM_LA]

Thanks ! I’ll pull the cover and check. I’ll let you know what I find.

[lazbo]

I took off the cover and tightened four bolts that secure the airconditioner...stopped my leak

[TitanMike]

Originally Posted by Kentucky Bob

look at the styrofoam pan and i bet you will see a big chunk of the side wall of the styrofoam missing. the pan is not a replaceable part and the complete ac has to be replaced. if you can look up some of my previous post, you will see pictures i posted of the busted condensate pan.

I have repaired a similar Styrofoam part on a window AC unit at my home. If one can gain access, use the non-expanding "Good Stuff" foam in a can. Depending on access, build a backing "form" with Duct Tape across back of break or missing section. Then carefully build up a layer of foam in the gap. Work on getting first pass/layer in back of gap and let cure. Finish with subsequent layers on top until patch is complete. Remove excess with serrated steak knife if necessary.

The Non-Expanding foam for use around windows and doors is the stuff to use. Cures a creamy white. The expanding foam used for insulating large areas expands into areas you don't want it. This stuff usually cures with an orange/brown color.

[AllenD]

Mine was doing the exact same thing. Took outside cover off 10 times. No blockage. Had 2 techs look at it they couldn't find anything. I finally cut out two small portions of the filter to let in more air. So far no more problems.

[Edmo]

It seems to be a normal occurrence as it happens to me as well especially on humid days. I tightened the bolts holding the unit and blah blah. Nothing worked except a pan under the drips.
Seriously, when it happens, turning the unit on high for a while cuts down the leaking but it’s been a common complaint by a lot of people.

[Papaduck]

We had the same problem again this week; high temps and high humidity outside and water dripping from the AC vent/filter area. What I have found to work is cleaning the filter and periodically running the AC in "Dry Mode" per the Atwood Manual.

[GM_LA]

Thanks for the info. I’ll give that a try! I’ve owned several rv’s and never had issues . We live in Louisiana where we always have high humid conditions . Thanks