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11-02-2016, 10:44 AM
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#21
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Established Member
Join Date: Dec 2015
Location: Fort Walton Beach
Posts: 23
M.O.C. #18101
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Mine had to be running and raining. The tech explained that the restricted return ducts would cause the return air fan to create a vacuum in the Styrofoam cover over the condenser and fan. It made since considering there was water sprayed all over the Styrofoam, fan, and in the return air area. He feels some of the water is being sucked in from the seal and the room does have a slight bow due to the weight of the AC unit. Still waiting to hear from Keystone though...
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11-02-2016, 10:47 AM
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#22
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Established Member
Join Date: Dec 2015
Location: Fort Walton Beach
Posts: 23
M.O.C. #18101
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typo's = It made "sense" - the "roof", not the room
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11-02-2016, 02:28 PM
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#23
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Montana Fan
Join Date: Nov 2010
Location: Northwest Tennessee
Posts: 450
M.O.C. #10884
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Darn, may not be out of the woods yet! A/C was not running.
__________________
2017 Montana 3611
2012 Chevy 2500
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11-03-2016, 07:32 AM
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#24
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Montana Master
Join Date: Aug 2015
Location: SWFL
Posts: 964
M.O.C. #17801
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Our 3711FL experienced rainwater ingress thru the air conditioner, and it ran thru the two air returns. The dealer tech said he'd seen
__________________
2016 Montana 3711FL
2005 Ford F350, 6.0 diesel, short bed
Demco Hitchiker Auto Slide hitch
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11-18-2016, 04:43 AM
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#25
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Established Member
Join Date: Dec 2015
Location: Fort Walton Beach
Posts: 23
M.O.C. #18101
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I have my Montana back. Keystone had the dealer put PVC pipes in air returns to increase return airflow, which should stop the return fan from picking up water before it can drain through the drain holes on the bottom of the AC unit. Keystone did not feel the slight bow of the roof due to the weight of the AC unit was an issue. The dealer, Johnny's RV in Mobile, AL (very helpful and friendly)thought this was a temporary fix and felt the roof needed to be supported better near the AC unit. I have not had a chance to test it yet, so I hope it is good. I am satisfied for now with the Keystone fix. I will make sure I test it several times before the warranty is up. Thanks for all of the helpful input.
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06-11-2017, 09:26 AM
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#26
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Established Member
Join Date: Dec 2015
Location: Fort Walton Beach
Posts: 23
M.O.C. #18101
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Update: I was still getting water in the return vent. The PVC pipes the dealer put in to keep the return vents from collapsing were only 1/2 inch. I replaced with 1.25" and the A/C unit performed much better, but still water. I followed the sealing instructions listed earlier in the thread, still some water. I followed the Dometic service bulletin that had me drill more holes for draining, still some water. I taped the front of the shroud seam as some had mentioned and NO WATER!! I personally think the terrible design of the shroud is the main culprit. If designed properly, the other fixes would probably not be needed. My suggestion to anyone with this problem is, since you have to get on the room, you might as well do all of the above since you are up there... .
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06-11-2017, 09:27 AM
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#27
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Established Member
Join Date: Dec 2015
Location: Fort Walton Beach
Posts: 23
M.O.C. #18101
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Roof not room.
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06-11-2017, 10:48 AM
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#28
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Montana Fan
Join Date: Sep 2016
Location: West Melbourne
Posts: 310
M.O.C. #18980
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Gosland. you should make certain that they seal the holes as John described. There is also a current thread with a Heartland service bulletin describing this fix and also drilling additional drain holes. I gave up on CW ever completing this and did it myself.
__________________
Butch and Kathy
2016 3160RL Legacy, Sailun S637, Centramatic Balancers, 2-T105s, Amish Refrigeration, ARPrv, SoftStartRV, FlexArmor roof
2016 F350 6.7L SRW
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