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07-29-2011, 12:22 PM
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#1
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Senior Member
Join Date: Jul 2005
Location: Hawkesville, Ontario, Canada
Posts: 168
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water damage
The forward a/c gasket that I struggled to replace last summer is leaking again. Was installed as per instructions. Should I have used silicon anyway.
Any expert advise how to seal it please.
Also, does anyone have a remedy for the brown water stains that resulted on the headliner inside. I have an area about two feet diameter surrounding the a/c unit that looks terrible.
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07-29-2011, 12:36 PM
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#2
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Senior Member
Vintage RV Owners Club Fleetwood Owners Club
Join Date: Jun 2009
Location: Somewhere in the woods in Belfair, WA, WA
Posts: 1,250
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Did you try tightening the gasket a bit more?
If your gasket (I assume you're talking about is the square 14"x14" foam gasket) was properly installed and correctly tightened down to 1/2" thick it should not leak for years.
Could you have over-tightened it and crushed the foam?
Silicone is useless; please, please NEVER use it on your roof.
__________________
Life rocks when your house rolls
Senior Chief & the Cheese Queen
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07-29-2011, 02:39 PM
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#3
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Senior Member
Join Date: Jul 2005
Location: Hawkesville, Ontario, Canada
Posts: 168
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Appreciate your help.....when I did it the roof, which is pebbled vinyl, not rubber or whatever was cleaned with spirits. I let it dry and stripped the membrane off the new 14 X 14 gasket as per instructions. It stuck to the bottom of the a/c unit until I placed the whole assembly over the hole. From the inside I tightened each of the 4 bolts 6 turns at a time until the gasket was compressed to about 1/2 it's thickness. The old one had been overtight as it was barely paper thin when I removed it.
Water is definitely seeping under the rubber and migrating along the inside edge of the hole. How it gets in is a mystery to me too.
What if I lift the unit and lay down a bead of plumbers putty (they sell in like pencil sticks) on a new gasket ? Then compress it like before.
Darn frustrated by a leak that won't stop.......more input is welcome.
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07-29-2011, 03:41 PM
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#4
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Moderator Emeritus
Ford Super Duty Owner
Join Date: Aug 2000
Location: Bryan, TX when not traveling.
Posts: 22,942
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After a new gasket is installed, you will need to tighten it about 4 weeks after the install.
Above all, do not apply any caulk or sealant to the gasket.
Ken
__________________
Amateur Radio Operator (KE5DFR)|No Longer Full-Time! - 2023 Cougar 22MLS toted by 2022 F150, 3.5L EcoBoost Tow Max FX4 Lariat Travel with one Standard Schnauzer and one small Timneh African Gray Parrot, retired mechanical engineer
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07-30-2011, 06:24 AM
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#5
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Senior Member
Vintage RV Owners Club Fleetwood Owners Club
Join Date: Jun 2009
Location: Somewhere in the woods in Belfair, WA, WA
Posts: 1,250
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Go up on the roof and check that the condensate drain is not plugged with debris; sometimes this will cause leaking internally.
__________________
Life rocks when your house rolls
Senior Chief & the Cheese Queen
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07-31-2011, 08:09 PM
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#6
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Senior Member
Freightliner Owners Club
Join Date: Apr 2002
Location: Pensacola
Posts: 2,728
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For water stains, try using a mild OxyClean solution and a soft brush or sponge. Let it sit for several minutes then blot with a towel. Always try a test area just in case.
Hope this helps. and good luck.
__________________
Hooligan, Pensacola, Fl -U.S. Coast Guard 1956-1985
2016 Thor Siesta Sprinter 24ST diesel -1972 Moto Guzzi
2008 Suzuki Grand Vitara TOAD
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08-08-2011, 02:24 AM
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#7
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Senior Member
Workhorse Chassis Owner
Join Date: Nov 2005
Posts: 627
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Is the AC leaking only when it rains or does it leak on sunny days as well?
Jack
__________________
2004 Winnebago Brave 34D with the usual add-ons
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