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Old 07-22-2011, 06:48 AM   #1
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Leaky AC on new Flying Cloud

We have a new 2011 23ft Flying Cloud with the white oval Dometic AC unit. One side of it rains water on occasion; at other times, it just drips. Any suggestions on how to deal with this? We are on a trip so it's not easy to get to a dealer right now.
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Old 07-22-2011, 07:22 AM   #2
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2011 is way newer than I am used to. But, on the older versions....and I would think them the same....you would have to take the inner air panel off...thats with four screws thru the bottom face. That exposes the inside hole to the unit. At the four corners there are long bolts that extend up thru the pan, roof,and into the ac unit. By tightening those you compress the seal between the opening and the roof/pan.
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Old 07-22-2011, 07:59 AM   #3
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Are you saying it leaks when it rains? Or the water rains down from the air conditioner inside the trailer, when the air is running but not raining outside? If it is not raining outside and water is running inside from the air conditioner, you have a condensation drain for the air conditioner that is not hooked up properly or it is plugged. If it leaks when it is raining outside then follow post #2.
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Old 07-23-2011, 06:53 AM   #4
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Quote:
Originally Posted by ventport View Post
Are you saying it leaks when it rains? Or the water rains down from the air conditioner inside the trailer, when the air is running but not raining outside? If it is not raining outside and water is running inside from the air conditioner, you have a condensation drain for the air conditioner that is not hooked up properly or it is plugged. If it leaks when it is raining outside then follow post #2.
The problem is inside when it is hot and humid outside. I talked to an AS tech who said that the condensation pan is getting overloaded and the fan is blowing some of the water around and eventually it drops out the vents on to the floor. He said it is happening to others at the dealership. His solution was to turn it off periodically, let the pan drain completely then on again. His comment was that it will only occur when there is excessive humidity with high temps so the tendency is to run the AC continuously. Last night was cooler - no drips inside.
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Old 07-23-2011, 10:25 AM   #5
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That is an interesting theory, but... The drain line should be able to keep up on the most humid days. We were at the International this year and it was extremely hot and humid and the output from the discharge line was a constant drip. It was hardly enough to overpower the drain line.

If your drain need to "catch up" I would check for any blockage at the pan or in the drain line.
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Old 07-23-2011, 11:36 AM   #6
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They may have changed the drain system if this is suddenly showing up on new units. I understand the system they used for years was out of date and a cheaper and better system is available, but apparently that is not what they are using.

I'd look for a leak or blockage in the drainage system. If you don't have the tools to do so, any RV shop should be able to solve it—blowing out the tubing with a compressor may work.

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Old 08-13-2011, 02:01 AM   #7
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I'm having the same problems. Drops of water inside the trailer when it is not raining outside. Now, I am having a bigger problem. The unit hums, but the fan is not working. I am traveling in Alaska and have seen my share of dust and dirt. Any suggestions? I plan to head south in a few days and thinking of taking it to a dealer in Alberta or BC. It is still under warranty. I don't want to wait until I get back to Georgia. I may need it. However, for now, the fantastic fans are keeping me cool when I need cool air.
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Old 08-13-2011, 03:41 AM   #8
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We have a 2009 28 ft Flying Cloud and had the same problem,The dealer took of the inside shroud of the A/C,this then exposes the drip pan that is supposed to catch condensate and any water that comes in through the outside louvers of the A/C unit.Ensure that the drain line is not plugged. The dealer found that our drip pan was cracked in 3 places,he replaced the drip pan , we have not had a problem since (knock on wood)
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Old 08-13-2011, 07:10 AM   #9
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New unit - that's what a warrenty if for - they are responsible - DOCUMENT with pictures and notes in a log. Send Airstream an email or letter to document dates of reporting the issue so there is a record of complaint. DO NOT MAKE major repairs as they will tell you that they are not responsible UNLESS they tell you specifically what to do on your own with their advice. Get it to them to make repairs.
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Old 08-13-2011, 11:34 AM   #10
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As CrawfordGene suggested, I believe that the newer drip pans cannot accommodate 100% of the condensate that the unit is capable of producing in conditions of high humidity. The residue accumulates up there until it just overflows and drips through the air distribution box onto my floor. I have found that requiring the fan to run continuously (in "low" or "high" mode, as opposed to "auto", which is what I always thought I should be doing on hot days!), exacerbates the problem. (I can stand outside my trailer and watch the flow of condensate through the drain tube actually SURGE whenever the fan cycles off.)
FYI, prior to my enlightening discovery, I dragged it to JC over this (and other issues)......after running it for 2 hours or so (with the distribution box removed), and observing no inside dripping, they concluded that it must be MY fault for "restricting the airflow" by NOT running it without all 5 of the outlets open at ALL times, (including the little ones on the side, and the huge, annoying one in the middle). Well, in retrospect, I should have made them reinstall the box, and THEN run it, but instead, giving them the "benefit of the doubt", I left JC, and in the ensuing days, obediently tried it THEIR way, with no success. It's as if the "aerodynamics" of the box somehow restrict the proper drainage of condensate.
My conclusion is that Dometic needs to take this sleek new distribution box back to the drawing board......
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Old 08-13-2011, 11:46 AM   #11
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Also, the new upper units attach with 3 long bolts, and I'd be careful about "tightening" them.....I learned the hard way.
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Old 08-13-2011, 11:55 AM   #12
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As water makes its way through the walls, drips can continue for a long time after rain has stopped or the A/C is off. If it is the A/C (it could be a leak and the A/C), a clogged drain may let the water drip for a long time through the pin hole that is left in the drain hole or tube. Leaks can be hard to diagnose and can require removing a lot of stuff to find. Mechanics who are in a hurry can miss things. New trailers can have lots of leak problems that only show up several months after delivery.

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Old 08-13-2011, 02:28 PM   #13
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Same Problem with 2010 FC

I have the same interior drip problem but the drain seems to be working. However, when I shut off the A/C after running it all night, a surge of water comes out of the drip line as though a larger amount of water is being held in the drip pan. The surge lasts for approximately 10-15 seconds. Why does that happen? Is it an internal airflow problem whereby the water is trapped until the fan is shut down? BTW, I've been running the A/C all night, high fan, lowest temp, with only one vent (pointing aft) open. Under these conditions, with modest relative humidity, I've been getting a large amount of water draining inside the rig, usually coming out the right side filter area.
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Old 08-13-2011, 09:13 PM   #14
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maybe they need to put a larger diameter drain line. how about a pump on the drain line (like a windshield washer pump) to handle the heavy flow?
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