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Old 01-18-2013, 07:34 PM   #1
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Roof Leak

Hey Guys,

I have a leak around the AC on my Allegro Bay, I am sure that I need to re caulk around the unit, is there anything else that I should check on while doing this.

Thanks

Hunter 45
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Old 01-18-2013, 07:39 PM   #2
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Hunter might as well remove the cowling, clean the fins and remove any debris.. The sealant must be completely removed and cleaned. The type of sealant used will be dependent on your roof material.. Lots of us here recommend Eternabond tape and sealant. It won't leak and it is permanent.
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Old 01-18-2013, 07:41 PM   #3
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On our 06 Allegro Open Road we had a leak around the skylight above the shower. We replaced all of the caulking on the roof while we were up there.

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Old 01-18-2013, 07:45 PM   #4
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AC units do not get caulked as far as I know. They have a gasket. If that gasket is tightened too much , it can cause a leak. Also the unit may have loosened and needs to be tightened. The latter happened to me. You can also have a water leak when the drain holes are clogged. This has happened to me too.

I would have these three things checked out.

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Old 01-18-2013, 07:50 PM   #5
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Hunter Cliff is correct. In our 03 Excursion we simply removed the indside vent and tightened the flange bolts thus compressing the gasket. Worked immediately.
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Old 01-19-2013, 06:11 PM   #6
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Do I have to remove the unit from the RV in order to replace the seal. I tightened the bolts that hold the unit down today and ran water over the area and water still seeps down the front hold down bolts. I am going to take the cover off tomorrow to see if maybe there is trash causing the water to pool up
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Old 01-19-2013, 06:19 PM   #7
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Yes you do have to remove the unit to replace the gasket. Not a hard job but you will need a buddy to help you lift it straight up and off. Clean off old gasket and surfaces on unit and roof apply new gasket and re set ac unit and snug down.
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Old 01-19-2013, 06:28 PM   #8
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Quote:
Originally Posted by Hunter 45 View Post
Do I have to remove the unit from the RV in order to replace the seal. I tightened the bolts that hold the unit down today and ran water over the area and water still seeps down the front hold down bolts. I am going to take the cover off tomorrow to see if maybe there is trash causing the water to pool up
CUT POWER AT THE BREAKER FIRST...

Yes..you have to remove it, but is is not that difficult. Remove the inside cover, 4 to 8 screws, 4, one in each corner, then 3 or 4 under the filter door.
It will come straight off, then one each corner, a long, 6" or so thru-bolt, or screw, remove these, then you can lift the unit from the roof. It is bulky, but not that heavy, good to have some help. replace, center the new gasket, CAREFULLY set the unit back on the new gasket, do the 4 thru-bolys, then the screws, you are done!
Maybe an hour.
Don't try to caulk it, you will only ultimately make the problem worse, and end up rotting ou the roof deck, and, that is super expensive to fix!
You may or may not have to disconnect the electric feed, again not difficult, if in doubt, take pics so you can refrence them when going back together...
have fun.....let us know...
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Old 01-19-2013, 10:49 PM   #9
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My rear AC was leaking when it rained. But it was leaking from the inside the unit. Ended up being condensation from the unit having too much dust inside. I had it cleaned and no more water. Don't know if it applies to you. Just something I came across.
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Old 01-20-2013, 04:41 AM   #10
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I would recommend the use of Eternabond tape as Clayo recommened in earlier response. I use it and itworks and is permanate. Great stuff.

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Old 01-20-2013, 10:10 AM   #11
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DO NOT caulk the A/C gasket. You can try to tighten it slightly, and if that does not stop the leak, you need to remove the A/C unit and replace the gasket. It is not hard to do, but you must get up top to do some of the work.

Ken
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Old 01-20-2013, 06:22 PM   #12
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totally agree here. same issues on mine
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Old 06-24-2013, 02:57 PM   #13
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Yeah, calking is not a good for this job. EternaBond is probably the best way to go. I've fixed two seam leaks with it and they're both going 5+ years strong. [moderator edit]You can sometimes find it cheap on ebay. Good luck and let us know how it turns out
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Old 06-25-2013, 07:37 AM   #14
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Ok, got this one stopped, no more roof leaks, Hooray. Now for a new issue. On the passenger side, infront of the seat, in the middle of the floor, the carpet gets wet during a long rain, the carpet is dry everywhere around the area except for the spot out in the middle, any ideas on where it can be getting in, to only wet the center of the area, no signs of water coming in throught the roof so no drip there
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