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Old 03-03-2012, 03:14 PM   #1
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8285 WS A/C unit leaking condensate inside

This is the second time this has happened. The first time my Dealer resealed the roof unit thinking rain was leaking into the camper through the A/C. I didn't think that was the problem. That was 6 months ago. Now, condensate is leaking into the camper again. (Hasn't rained). Condensate is running down the outside of the roof as is normal but why is it also coming into the camper? I removed the A/C cover on the roof and do not see any leaves etc and did not see any water pooling around the condenser or coils. Any help would be appreciated.
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Old 03-03-2012, 05:40 PM   #2
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If this only happens when the AC is running and not when it rains and the unit has been resealed to the coach roof then my guess is that the resealing is not right, (unlikely if rain does not get in) or there is a hole or a crack under the condenser somewhere out of sight, possibly where conduits come and go.

The condenser will drip moisture onto a tray which should then trickle away to a pipe or gutter or just to the coach roof and away. Obviously this is happening but some is finding its way inside possibly by a blocked route. Only thorough investigation is going to find it.

Sorry for only stating the obvious here but removing the roof cover and searching possibly with the aid of a water bottle and plastic tube might you duplicate the ingress sufficiently to find the hole.
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Old 03-03-2012, 06:25 PM   #3
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I make the assumption that you are in a place with high humidity.

Try this if the condensate is primarily on the ceiling within a couple of feet of the AC. Close all windows, vents and doors. Turn AC fan to high and constant run. With the exception of mopping the ceiling, leave everything alone for a few hours.

High humidity in outside air will condense and drip from the ceiling where the ceiling is coldest, near where the ducts exit the AC. Close up to stop the humidity from entering the trailer and increase the fan speed to temper the temperature of the air exiting the AC. It takes the AC a while to deal with the humidity that is already in the trailer. Also take it easy on hot, steamy showers and cooking that produces lots of steam.

PS Condensate is running down the outside as normal because the AC is doing its best to get all of the humidity out of the inside air.
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Old 03-03-2012, 07:42 PM   #4
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I had a problem with our RockWood when we first used it in the summer of 2006. What had happen was there was not enough insulation around the duct work right at the units openning, the ceiling around the return had condensation on the in side on the ceiling panel. Once insulation was added the problem went away.

When the units are installed on the roofs the seals that come with the units seal up nice and tight and in most cases the roofs on RV's have some kind of crown in the middle and rain will run a way from around the base of the unit.

Where I work at we have 6 ticket booths and all 6 have Demetic RV A/C units, the only time we get water dripping from the units inside of the booths is because the roof drains get block from leaves and other junk causing the water to rise on the roof and then the water is higher then the base of the A/C unit, the leak comes out of the return side...Note: the roofs on the ticket booths are almost flate but do have a slight pitch to the drain hole.
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Old 03-04-2012, 09:15 AM   #5
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When I state leaking I mean quite a bit of water. I had been in a high humidity environment for two months with no problems. We moved a few hundred miles and it is currently less humid. I'm thinking traveling may have opened up an entry into the camper for the condensate to flow. There is no drip pan on the roof so the condensate just flows onto the roof and off the back of the camper, however, I believe some of it is flowing back through the air handler. Currently no need for A/C so I'll get back on the roof soon and check out again. Thanks for the responses. All suggestions/ideas are welcome.
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Old 03-06-2012, 05:51 PM   #6
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AC Unit

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Originally Posted by Hoo Dad View Post
When I state leaking I mean quite a bit of water. I had been in a high humidity environment for two months with no problems. We moved a few hundred miles and it is currently less humid. I'm thinking traveling may have opened up an entry into the camper for the condensate to flow. There is no drip pan on the roof so the condensate just flows onto the roof and off the back of the camper, however, I believe some of it is flowing back through the air handler. Currently no need for A/C so I'll get back on the roof soon and check out again. Thanks for the responses. All suggestions/ideas are welcome.
A possible issue might be with unit's clamping bolts. Before we bought our unit another thread talked about the 4 main bolts that "clamp" the AC to the roof & water coming in. Upon checking ours I found them to be very loose, luckly I hadn't washed it yet. Your's may have worked loose?
They are accessed from inside by removing the filter cover then taking out the 8 screws that hold the control panel.
Hope this helps,
Bob
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Old 03-06-2012, 08:20 PM   #7
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Quote:
Originally Posted by Celicabob View Post
A possible issue might be with unit's clamping bolts. Before we bought our unit another thread talked about the 4 main bolts that "clamp" the AC to the roof & water coming in. Upon checking ours I found them to be very loose, luckly I hadn't washed it yet. Your's may have worked loose?
They are accessed from inside by removing the filter cover then taking out the 8 screws that hold the control panel.
Hope this helps,
Bob

ditto
Check the 4 srews from the inside after you take the cover off.
Do not over tighten and hopefully you will see yellow or orange pieces of materials along the space of the roof on each side. That is a measuring device to not to compress any more than that plastic spacer.

Check this document and see page 8 and the image insert in the circle to give you an idea.
They are called gasket indicating tabs.
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Old 03-08-2012, 10:58 AM   #8
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Celicabob and Iggy, Thanks so much for the information! I removed my grille and found the clamping bolts. I did not find the bolts to be what I consider loose. However, I snugged them up a little more. I'd rather fix the problem myself than have to haul the camper back to the dealer. So, I will wait and see if it leaks again. The second year warranty isn't up until January 2013.
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Old 03-08-2012, 11:02 AM   #9
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Nigels, I may have to resort to your recommendation concerning removing the roof cover and looking for the leak by putting water around possible entry points. Thanks also.
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Old 03-08-2012, 01:01 PM   #10
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Quote:
Originally Posted by Nigels View Post
If this only happens when the AC is running and not when it rains and the unit has been resealed to the coach roof then my guess is that the resealing is not right, (unlikely if rain does not get in) or there is a hole or a crack under the condenser somewhere out of sight, possibly where conduits come and go.

The condenser will drip moisture onto a tray which should then trickle away to a pipe or gutter or just to the coach roof and away. Obviously this is happening but some is finding its way inside possibly by a blocked route. Only thorough investigation is going to find it.

Sorry for only stating the obvious here but removing the roof cover and searching possibly with the aid of a water bottle and plastic tube might you duplicate the ingress sufficiently to find the hole.
Water derived from humidity will condense on the evaporator coil not the condenser coil. The condenser coil will condense refrigerant as it rejects heat, the evaporator coil will condense water on the coil as it absorbs heat. Look for the pan and drain line from the evaporator coil, I suspect the pan or drain is blocked or damaged if you have no reason to suspect rain intrusion. Good luck!
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