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01-07-2019, 04:32 PM
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#1
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New Member
Join Date: Jan 2019
Location: Springdale
Posts: 4
M.O.C. #23222
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Leak in the intake vent
We have a 2017 Montana high country HM305RL. only when it rains we have a small leak dripping from one of the filtered intakes in the living room. My husband has been on the roof several times taken the cover off and sealed everything he could but it still leaks.
Has anyone else had this issue? Any advice on how and where to fix it?
Thank you!!!!
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01-07-2019, 06:05 PM
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#2
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Montana Master
Join Date: Feb 2012
Location: Lake Gaston
Posts: 8,773
M.O.C. #12156
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Some have had problems with the dometic blizzard two piece cover and unused installation holes allowing rain to leak in. Detailed fixes posted on previous posts, try a search. Don’t have them on our rig, but believe fixes included plugging the extra holes and caulking for the cover. If your AC is blizzard, would start there.
__________________
Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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01-08-2019, 07:08 AM
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#3
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Montana Fan
Join Date: Oct 2017
Location: Fulton
Posts: 456
M.O.C. #20688
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Don’t have the same model but our ac unit was not properly centered over the roof opening. Used a mobile service to pull unit replace gasket reposition unit. Took lots of pictures and submitted to Keystone and reimbursed.
__________________
Wayne & Malinda
2018 Montana 3731FL
MORryde IS/DiscBrakes
2017 F450 DRW KR 4x4
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01-08-2019, 07:57 AM
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#4
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Montana Master
Join Date: Feb 2012
Location: Lake Gaston
Posts: 8,773
M.O.C. #12156
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Worth looking at, but generally a bad gasket will leak all the tine, not just when it rains.
__________________
Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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01-08-2019, 08:48 AM
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#5
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Montana Fan
Join Date: Oct 2017
Location: Fulton
Posts: 456
M.O.C. #20688
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Our ONLY leaked when it rained and came through the return air vent.
__________________
Wayne & Malinda
2018 Montana 3731FL
MORryde IS/DiscBrakes
2017 F450 DRW KR 4x4
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01-08-2019, 12:33 PM
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#6
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Montana Master
Join Date: Sep 2017
Location: Tacoma
Posts: 1,567
M.O.C. #20475
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Quote:
Originally Posted by sjroark
We have a 2017 Montana high country HM305RL. only when it rains we have a small leak dripping from one of the filtered intakes in the living room. My husband has been on the roof several times taken the cover off and sealed everything he could but it still leaks.
Has anyone else had this issue? Any advice on how and where to fix it?
Thank you!!!!
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If you go to the Dometic web sit they have a fix for that problem or you can find here if you do a surch for A\c roof leaks.
__________________
Bob & Carol Washington St
2017 HC HM352RL 2018 Dodge 3500 laramie CC LB 4x4
Curt Q25 with puck system, Factory air bags
Happy Trails
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01-10-2019, 03:29 PM
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#7
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Seasoned Camper
Join Date: Jul 2018
Location: Vacaville
Posts: 81
M.O.C. #22227
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AC Unit Mount: What a Mess
The Roof Openings on my 305RL were not cut in the right place. They were crooked and too large. The AC Gasket didn't make full contact around the openings. For the most part, only half of the gasket actually made contact with the surface of the roof. The rest of the gasket surface was located over the roof openings.
The worst location: there was no contact at all between the gasket and the roof surface along a 5-inch section of the Supply Air roof opening. The gasket was located completely over the opening in that area.... As a result, rainwater was able to leak into the roof opening and the duct. Water also got to the closest lag screw that secures the AC Unit to the Roof. The lag screw was only fastened to the 1/2-inch thick Oriented Strand Board: there was no framing below it. Due to the leak, the OSB softened and the screw just pulled straight out. All four of the hold-down lag screws were rusted.
The RV Roof Specialist that I took it to affixed framing to the roof deck/structure to reinforce the openings and make them a bit smaller (so that the gasket would make full contact with the roof surface). He also installed a metal frame with "up-bolts" (the frame is attached to the interior ceiling). The bolts extend up into the AC Unit base frame. The AC Unit is now held down with nuts and bolts - not just lag screws coming down from the top side.
I just sent a letter to Keystone describing the issue and requested reimbursement for the repairs...
__________________
Steve & Terri
2017 305RL Montana High Country
2017 F-250 CCSB Diesel Lariat FX4
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01-11-2019, 10:10 AM
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#8
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Seasoned Camper
Join Date: Jul 2018
Location: Vacaville
Posts: 81
M.O.C. #22227
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Correction: it was the return air opening
Correction: the roof opening where there was no contact between the gasket and roof surface was the RETURN AIR opening. see attached picture
__________________
Steve & Terri
2017 305RL Montana High Country
2017 F-250 CCSB Diesel Lariat FX4
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01-11-2019, 11:36 AM
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#9
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Montana Fan
Join Date: Oct 2017
Location: Fulton
Posts: 456
M.O.C. #20688
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Steve & Terri Yep that’s pretty much how ours looked.
The roof openings were not oversized just not properly aligned.
Major improvement in air flow also after repairs.
It makes me wonder how often this is the issue when folks complain about their unit not cooling?
__________________
Wayne & Malinda
2018 Montana 3731FL
MORryde IS/DiscBrakes
2017 F450 DRW KR 4x4
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01-11-2019, 02:28 PM
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#10
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Seasoned Camper
Join Date: Jul 2018
Location: Vacaville
Posts: 81
M.O.C. #22227
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I wonder about that and collapsing return ducts. When I first got the rig, the AC hardly worked at all. I found a thread that talked about the return air ducts collapsing near the return air grills. I checked my return air ducts - and sure enough - they had collapsed to about half their normal size. I installed plastic tubes in the return air ducts to expand them to their full size (as recommended by many on the thread) and the AC system then worked fine. When the ducts were collapsed, there wasn't enough airflow through the evaporator coil and (I believe) the coil was icing up. I know another couple that bought a 2018 HC: they found and fixed the same problem.
__________________
Steve & Terri
2017 305RL Montana High Country
2017 F-250 CCSB Diesel Lariat FX4
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01-16-2019, 04:05 PM
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#11
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Established Member
Join Date: Aug 2016
Location: Brick
Posts: 19
M.O.C. #18866
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We had the same problem after about 1 year of use. Took to camping world and they said screws were all rusted. Removed unit, sealed around new screws and reinstalled. Over $400 later it still leaks. At a loss for what to do now. Will never buy a Keystone again and not just for this reason.
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01-16-2019, 06:06 PM
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#12
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Established Member
Join Date: Jul 2016
Location: SPRINGFIELD
Posts: 23
M.O.C. #18759
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Quote:
Originally Posted by sjroark
We have a 2017 Montana high country HM305RL. only when it rains we have a small leak dripping from one of the filtered intakes in the living room. My husband has been on the roof several times taken the cover off and sealed everything he could but it still leaks.
Has anyone else had this issue? Any advice on how and where to fix it?
Thank you!!!!
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I have the same model, 2016, could you send a picture?
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01-16-2019, 08:50 PM
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#13
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Established Member
Join Date: Sep 2018
Location: Mesa
Posts: 21
M.O.C. #22567
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Same issue with our 2018 3931fb return air on door side in rear living room. Like previous posts, it is the Blizzard style that has the old reverse clam shell type closure fitting. We removed cover, no exposed drill holes so tightened the existing bolts then put cover back together and added duct tape where the clam shell cover meets as a temporary seal fix until we get the newer style cover. So far so good after several hard rainfalls.
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01-17-2019, 06:28 AM
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#14
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New Member
Join Date: Apr 2016
Location: Imperial
Posts: 8
M.O.C. #18509
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I have a 2017 370BR that had the same issue and there are a lot of threads and posts on how to fix it. The one that finally fixed mine was the sealing the seam where the top and bottom cover comes together. It is a very poor design. Some have used gorilla tape and others simply caulked the seam with silicon. I would follow all of the previous posts but finally seal the seam in the ac shroud.
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01-17-2019, 07:28 AM
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#15
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Seasoned Camper
Join Date: Jul 2005
Location: ringgold
Posts: 53
M.O.C. #4165
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Leaky vent
I had problems with water dripping from air return vent. Had it for service at dealer several times. After several fixes and a new ac leak stopped. Have Dometic wisper air only rear ac leaked
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01-17-2019, 07:51 AM
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#16
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Montana Master
Join Date: Nov 2018
Location: Menifee
Posts: 1,109
M.O.C. #22986
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I have a 2018 3920 and it’s going in for warranty service for this and other things.
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01-17-2019, 08:19 AM
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#17
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Seasoned Camper
Join Date: May 2016
Location: Glen Alpine
Posts: 52
M.O.C. #18569
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Quote:
Originally Posted by Kruskop's
Same issue with our 2018 3931fb return air on door side in rear living room. Like previous posts, it is the Blizzard style that has the old reverse clam shell type closure fitting. We removed cover, no exposed drill holes so tightened the existing bolts then put cover back together and added duct tape where the clam shell cover meets as a temporary seal fix until we get the newer style cover. So far so good after several hard rainfalls.
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What is this newer style cover you mention above?
Thanks
John - 2016 3820FK
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01-17-2019, 08:44 AM
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#18
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Seasoned Camper
Join Date: Jul 2005
Location: ringgold
Posts: 53
M.O.C. #4165
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I had to take mine back several times. Service Mgr said Dometic had several fixes for problems. I guess they still haven’t fixed problems. Mine is 2016 3611 we first had water dripping from return air thought it was from condensation since we are in the South. But on a trip to Montana with snow I decided it not condensation.
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01-17-2019, 03:03 PM
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#20
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Established Member
Join Date: Jul 2016
Location: SPRINGFIELD
Posts: 23
M.O.C. #18759
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Just me
Quote:
Originally Posted by MidMOTraveler
Don’t have the same model but our ac unit was not properly centered over the roof opening. Used a mobile service to pull unit replace gasket reposition unit. Took lots of pictures and submitted to Keystone and reimbursed.
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We have a 2016 305RL, during walk thru (purchase), CW told me the leak was condensation due to the hot/humid weather, doubted this, later when using the rig we encountered the same leak (low humidity). Our AC's are Dometic. Took back for one of the many warranty problems, finally the tech told me the AC was not installed right. New seal kit ordered, repaired, have not had a problem since.
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