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Old 08-02-2018, 06:45 AM   #1
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Pooling around AC? Does anyone have a fix"

2003 DS I have an issue of water intrusion around the ac.
Does anyone have a solution to pooling around ac. I called the former owner he said that 4 bolts that hold the ac were almost rusted in half. He Drilled out the area put in larger bolts (4). He sad he had a friend who said to build up the roof with plywood. Then fiberglass the plywood to the roof. I dont know much, so this sounds odd. Former owner believes water is entering through the bolts. Does anyone have a solution or suggestion on how to resolve this issue
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Old 08-02-2018, 07:42 AM   #2
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Seal may be tip of the iceberg

Seal around carriage(?) bolt with silicone sealant or rubber washer like on toilet tank seal. Problem could actually be caused from condensate, by product of a/c process. If really humid conditions causes extra moisture removed from air. If drain or drip pan overloaded moisture can back up and run inside. Ever move your car after running a/c and see a puddle under it?
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Old 08-02-2018, 09:09 PM   #3
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The proper "fix' for this is to remove the air conditioner, make 2 wood boards 3/4" thick to slide between the roof and rafters and glue them to the rafters. The side boards are fastened to the boards on the rafters with wood screws after the first 2 are secured.
BTW new thru-the-roof bolts are readily available.
You said the old bolts are badly rusted, this inferrs there is water damage inside the roof. That is the first priority, repairing water damage, building up the roof is second.
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Old 09-16-2018, 08:24 PM   #4
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The proper "fix' for this is to remove the air conditioner, make 2 wood boards 3/4" thick to slide between the roof and rafters and glue them to the rafters. The side boards are fastened to the boards on the rafters with wood screws after the first 2 are secured.
BTW new thru-the-roof bolts are readily available.
You said the old bolts are badly rusted, this inferrs there is water damage inside the roof. That is the first priority, repairing water damage, building up the roof is second.
THanks for the help. Still having issues
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Old 09-17-2018, 08:23 AM   #5
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THanks for the help. Still having issues
Have you made sure your drain holes are not plugged? That was my problem a few weeks ago. I had water dripping in the rv when the AC was on for a hour or more. I asked for advice here like you and was pointed in the right direction. I removed the cover off the AC and used a shop vac to clear the wasp nest inside and I vacuumed out the pan. It worked, no more drips. Not really sure if you’re having the same problem because you didn’t really give a good description of your problem. Pictures are worth a thousand words.
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Old 09-17-2018, 07:16 PM   #6
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Have you made sure your drain holes are not plugged? That was my problem a few weeks ago. I had water dripping in the rv when the AC was on for a hour or more. I asked for advice here like you and was pointed in the right direction. I removed the cover off the AC and used a shop vac to clear the wasp nest inside and I vacuumed out the pan. It worked, no more drips. Not really sure if you’re having the same problem because you didn’t really give a good description of your problem. Pictures are worth a thousand words.
I dont have a drain. What kind of pic would be helpful to you.
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Old 09-17-2018, 07:33 PM   #7
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I dont have a drain. What kind of pic would be helpful to you.
Though a rooftop RV A/C doesn't have a drain pipe sticking out, the condensate does collect in a pan below the evaporator coil. There is a little "chute" at one side of the pan that is supposed to allow the water to exit the shroud.

This is a great excuse to get up there and inspect and thoroughly clean the unit. It's something that needs to happen periodically anyway, so you're going to be ahead no matter what.
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Old 09-17-2018, 07:41 PM   #8
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I had water coming in my coach last week also. A bee or wasp had plugged the hole, which is only about 3/16" to 1/4" in diameter and hidden under the evaporator. Take the cover off and look under the side of the evap coil for the drain. Mine was on the same end as the compressor, but your might be different. If not the problem get new bolts, remove the a/c unit and install a new gasket. Be sure to tighten the bolts evenly so the unit sits level on the roof.
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Old 09-18-2018, 06:58 AM   #9
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I dont have a drain. What kind of pic would be helpful to you.
I don’t need a picture, and unless you have some kind of AC that doesn’t make condensation you have a drain. I received excellent advice a few weeks ago. I supplied a picture where the water was dripping in the rv, I was told to tighten my 4 bolts and check the drain pan. I was just trying to offer a possible solution. Good luck with your problem.
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Old 09-18-2018, 07:28 AM   #10
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I just had it to the shop. A new seal for each ac. New bolts and resealed everything up top. Brought it back to the shop they assured me its not leaking through the ac. I have a newmar dutch star. The ac are different than most rv. I dont have a drain line just slots (if that is what you mean by drains. Thanks for help. This has me very perplexed as to where the water is coming in. Only thing that was not re caulked was the terminus bars. Found a paper thin opening maybe that is where its coming in. Any other suggestions.
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Old 09-18-2018, 08:40 AM   #11
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Fix all your leaks and then park a little off level so the water runs off your roof. Most times it is the gasket needs replaced or your bolts have loosened up.
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Old 09-19-2018, 08:07 AM   #12
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I just had it to the shop. A new seal for each ac. New bolts and resealed everything up top. Brought it back to the shop they assured me its not leaking through the ac. I have a newmar dutch star. The ac are different than most rv. I dont have a drain line just slots (if that is what you mean by drains. Thanks for help. This has me very perplexed as to where the water is coming in. Only thing that was not re caulked was the terminus bars. Found a paper thin opening maybe that is where its coming in. Any other suggestions.
Since they assured you it’s not leaking through the ac, didn’t they have an idea where it’s leaking in from? If it only leaks when the ac is on it would have to be coming from the ac? Mine didn’t have visible drains it had 2 very small holes in a pan under the condenser. When I removed the cover and vacuumed everything out, I was able too see a little bit of water dripping out under the ac on to the roof. I put my finger under the ac and i could feel 2 very small drain holes. I went to the auto parts store and bought a small piece of vacuum line. I was able to get it under the ac and I blew through the hose, it cleared my drains. Have you ever parked your car with the ac on and notice water under your motor on the ground? That’s condensation draining from your ac. The same thing is happening with the ac on the rv. If it were me I would not be happy with a shop that did all the work you described and it still leaked.
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Old 09-21-2018, 12:07 AM   #13
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I dont have a drain. What kind of pic would be helpful to you.
Yes you have a drain hole. And it is plugged up. Get on top, pull the outer cover off and clean out the drain pan beneath the evaperator. Ok
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Old 09-21-2018, 02:48 PM   #14
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Yes you have a drain hole. And it is plugged up. Get on top, pull the outer cover off and clean out the drain pan beneath the evaperator. Ok
I've been trying to say the same thing, I guess he's not understanding. I had the same problem a few weeks ago. I got educated about my A/C drains on this forum, and I did exactly as you said and my problem was fixed.
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