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Old 03-09-2013, 07:07 AM   #1
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A/C gasket leaking??

I am a little concerned about the gasket around our A/C and not quite sure what is going on. Right after we brought it home I did discover the two rear mounting bolts were VERY loose and that the AC was "off center" side to side. I also found a small drip coming from the side where the gasket is sort of on the edge of the roof, rather than being flat on top of it.

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I tightened all the bolts and thought all was good, then yesterday, I again noticed some water coming in. Portions of the gasket are really wet, like water in a sponge. I know it's hard to see much in the pics, the entire bottom edge of the gasket is wet/damp. The area circled is wet top to bottom.

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Keep in mind, there is a LOT of water sitting on the roof right now. The ice and snow have created a dam around the AC.

Is this happening because of the excess water on the roof?
Is the gasket bad, perhaps because the bolts were so loose?
I don't have a problem replacing the gasket, but if this is just "normal" from excessive water on the roof, it may not prove much to replace it.

Thanks for any thoughts/suggestions.

Allen
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Old 03-09-2013, 07:42 AM   #2
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There's no doubt with the bolts that loose that driving down the road the seal broke loose from the A.C. unit. I would tighten things up and as soon as weather permits replace the gasket seal on the roof. You'll need to clean the area where the old gasket was before installing the new one.
If the leak is bad now you may want to take it in to a dealer and have it done right away so that you don't have any ceiling problems inside. Water has a way of really traveling once there's a leak.
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Old 03-09-2013, 07:46 AM   #3
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Not sure how to know for sure.
I would get the snow and water off the roof, let it dry and see if it leaks by using a water hose maybe.
How old is the gasket? I believe the A/C units have a 1/2" flange tab to keep you from compressing the gasket beyond 1/2"
The gasket could be compressed as far as possible and not sealing. In this case a new gasket will be needed.
The gasket may have gotten out of position as well with it being loose, which could make it difficult to get it to seal properly.

Once you have addressed the easy fixes, personally I'd install a new one.

There was a recent thread with the procedure laid out very well. Part I think was around $30

Best regards,
Doug
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Old 03-09-2013, 08:18 AM   #4
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Exjay1 showed us his repair in the" tec talk " section of the forum with very good photo's to help.
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Old 03-09-2013, 08:24 AM   #5
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... can't think of anything to add that the first 2 didn't say.

just wondering if melt water was being held by remaining ice and it's more than the gasket was designed for. but might seal OK with regular runoff
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Old 03-09-2013, 08:46 AM   #6
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Quote:
Originally Posted by OnTheGo View Post
... can't think of anything to add that the first 2 didn't say.

just wondering if melt water was being held by remaining ice and it's more than the gasket was designed for. but might seal OK with regular runoff
That is what I am wondering, the water was over 1/4" deep around the AC, you could no longer see the gap between the base of the AC and the roof. It's not usually like that when it rains. I did just go out and raise the tongue to get the water off the roof. That sort of scares me when all the water hits the rear bunk door, hopefully that seal is good!

Hopefully it will get warm enough today to get the rest of the ice off. I did see the thread on replacing the gasket, looks fairly simple, just not sure if its a bad seal or to much water around it. The unit is only a couple years old.
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Old 03-09-2013, 09:50 AM   #7
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Not knowing if the gasket was initially installed and compressed correctly, I would replace it with the correct procedure. The cost of the gasket and a couple of hours max of your time is cheap compared to the cost of fixing water damage.
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Old 03-09-2013, 10:38 AM   #8
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Quote:
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Not knowing if the gasket was initially installed and compressed correctly, I would replace it with the correct procedure. The cost of the gasket and a couple of hours max of your time is cheap compared to the cost of fixing water damage.
I would agree, it's better to be safe than sorry. I don't really like how it's off center anyway. I also wonder if with the bolts being so loose, that dirt/debris may have got under the gasket which could be why it's not sealing correctly.
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Old 03-09-2013, 08:56 PM   #9
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My new gasket is a little bit thicker that what was factory installed (or what was left of it) and sat about 1/4" higher once secured with the AC unit on top. also found a low spot between the roof and gasket that was allowing water in.
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Old 03-09-2013, 09:31 PM   #10
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Curious, did the gasket have a brand name? This is what I am thinking of getting: http://www.amazon.com/Camco-25071-Un...rds=rv+ac+seal

I think my problem may be due to it being off center, where I see most of the little drips is where the gasket is sort of flopped over the edge of the roof. This was taken when I discovered the loose bolts, this side is only about half on the roof, most of it isnt compressed at all.

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I also have a feeling a fair amount of dirt may have gotten under it, with it being so loose. What makes it even more fun, it has been raining all day long.
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