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Old 02-27-2018, 05:24 PM   #11
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Originally Posted by dwa1000 View Post
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.

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Roof drains are blocked. Drain pans are overflowing. Remove covers and look for blockage.
No blockage...
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Old 02-27-2018, 09:38 PM   #12
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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.
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Old 02-28-2018, 01:17 PM   #13
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Thanks ! Iíll pull the cover and check. Iíll let you know what I find.
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Old 02-28-2018, 04:09 PM   #14
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I took off the cover and tightened four bolts that secure the airconditioner...stopped my leak
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Old 02-28-2018, 04:36 PM   #15
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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.
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Old 02-28-2018, 10:59 PM   #16
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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.
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Old 03-02-2018, 01:05 PM   #17
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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 itís been a common complaint by a lot of people.
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Old 07-19-2018, 10:02 PM   #18
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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.
Attached Files
File Type: pdf Atwood Rooftop AC Ducted AC-1361 AC-1511.pdf (1.36 MB, 27 views)
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Old 07-20-2018, 09:05 AM   #19
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Thanks for the info. Iíll give that a try! Iíve owned several rvís and never had issues . We live in Louisiana where we always have high humid conditions . Thanks
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