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Old 10-19-2010, 10:38 AM   #1
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Roof AC leaks in heavy rain

We are at Doheny State Beach Campground having a spectacular thunder storms. There is a water leak in the roof AC from the rain. I would assume there is a gasket or two that need replacing. Does this require removal of the unit? It is leaking from the front half of the unit on the drivers side. Anyone done this?
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Old 10-19-2010, 01:59 PM   #2
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Pull the grill down were the air filter is. It might have screws or springs holding the grill on. There will be 4 anchor bolts. 1 on each of the corners. Tighten them with a snug fit. Try not to over tighten the bolts, it might damage something!

Hope this might help!
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Old 10-19-2010, 03:32 PM   #3
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Do not assume the leak is around the a/c itself. Any leak in the roof near it is probably going to run out around the a/c - it's the big hole in the middle of the ceiling that water anywhere will run to.

By all means snug up the a/c mounting bolts (don't completely crush the gasket, though), but also check around the tv antenna, other antennas, skylights, etc. Water can travel quite far to find its way to the interior.
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Old 10-19-2010, 10:33 PM   #4
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If the unit is ducted then tightening the gaskets require that the AC cover be removed and bolts tightened from the top side
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Old 10-19-2010, 11:21 PM   #5
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I took off the inside grill and tightened each bolt one turn which helped a great deal. The gasket is the original so I ordered a replacement and will install it before the snows start. I need a new shroud too so I will order that once I am sure of the model number.

Thanks forth help.
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Old 10-20-2010, 12:17 AM   #6
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Its not to difficult to do I just replaced mine today do to the same reason. It took me all of a hour to replace it. Took the 3 anchor bolts out, removed the old gasket and installed the new one and tightened the anchor bolts down. Just make sure not to tighten them down all the way.
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Old 10-20-2010, 10:24 PM   #7
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TheDubs I would think you would have to remove the 4 bolts disconnect the wiring and lift the roof unit off and set aside to remove old gasket and replace. Is this not correct? I also have had a leak during a heavy rain. Got on the roof and checked everything I could and could not find anything. I have tightened the bolts twice.
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Old 10-25-2010, 05:28 PM   #8
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Pete: from what I have read your method is correct. I bought the set that includes shimmy's in case there has been any settling of the roof. It arrived today so later in the week when the weather improves I am going to yank it.
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Old 10-25-2010, 05:53 PM   #9
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Forest let me know how it goes.

Thanks
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Old 10-30-2010, 02:12 PM   #10
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Thursday I brought the MH to the house and yanked the AC after running a pencil line around it. The original installation sucked. The original gasket was 4 piece. One side was 3/4 into the open space and the other side was squished tight. I scraped the old off including all other gaskets and the sealant on the front of the AC - a no no and then used solvent to clean and prep all surfaces.

I sealed the center seam and the placed the new gasket. Got the wife inside the MH while I lifted the AC onto 4 4x6 blocks over the opening lining it up with the pecil marks and the wife. I then put 1x2 blocks under the AC and removed the big blocks. Lines looked good, wife said good so I went down to check on the air duct alignment, perfect. Went up and removed the small blocks setting the AC on the gasket - perfect.

Went down to attach the pan with it's 4 bolts too much work. Went to the store and bought 1/4" all thread rod and 8 nuts. Cut the rod to bolt length. Threaded the rods in, placed the pan over the rods easily and double nutted each. Slowly tightened each till gasket was 50% compressed.

Final assembly and then sealed other roof seams. Rained hard last night very windy and not a drop inside.

Job well done, no cuts, bruises, broken bones or strains. Cheap too.
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Old 10-30-2010, 07:42 PM   #11
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Nice job. You ought to be a pro!
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