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Old 07-26-2015, 03:27 PM   #1
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AC roof leak

Is there anyway to caulk or seal around the AC unit on the roof ? I got a leak from were the AC unit sits coming inside around the AC
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Old 07-26-2015, 03:38 PM   #2
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There is a large foam gasket that surrounds the A/C as it sits over the hole in the roof. You might look at getting a new gasket and replacing the old one. The other option would be to tighten the 4 bolts that hold the A/C on the roof and see if snugging it down a bit will make the old gasket re-seal. If it works, I'd still look for a new one to replace the old, tired gasket.
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Old 07-26-2015, 03:41 PM   #3
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There is a seal around the AC unit, so no caulking. Typically there are four bolts holding the AC unit. These may need to be tightened. Remove the inside cover and look up. You should be able to locate the bolts and try to tighten them. If it still leaks it may be time to replace the rubber seal.
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Old 07-26-2015, 03:59 PM   #4
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Quote:
Originally Posted by BFlinn181 View Post
There is a large foam gasket that surrounds the A/C as it sits over the hole in the roof. You might look at getting a new gasket and replacing the old one. The other option would be to tighten the 4 bolts that hold the A/C on the roof and see if snugging it down a bit will make the old gasket re-seal. If it works, I'd still look for a new one to replace the old, tired gasket.

What's all involved in replacing the gasket?
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Old 07-26-2015, 05:43 PM   #5
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If you don't have one, download a manual for your particular make and model of AC. It will have installation instructions, I'm sure. In general, you'll have to remove the AC unit, clean around the 14" square hole in the roof, and then reinstall the AC unit. Screws and bolts are accessible from inside, under the ceiling cover.

Here's a universal gasket, but you could buy one specific to your brand if you'd like.

Amazon.com: Camco 25071 14" x 14" Universal Roof Air Conditioner Gasket Kit: Automotive
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Old 07-26-2015, 05:57 PM   #6
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What's all involved in replacing the gasket?
You have to remove your inside grill (if a ducted system) or ceiling control housing/air outlet (if non ducted), remove those 4 bolts previously mentioned (2 of those might be hidden behind a deflector/shield), remove the wiring to the unit on the roof, then remove the roof unit from the opening, remove and replace the gasket, then reinstall everything.
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