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Old 02-21-2012, 05:22 PM   #1
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Question Roof AC leak, but not at the seal

My roof AC unit leaks during a driving rain storm. When I put the cover over the unit, the leak stops. That indicates to me that the square seal (which is new) is doing it's job.
I searched the forums to no avail on this particular problem.
I'm sure, when I drive down the road the problem will get worse since I can't drive with the cover on it.
The shroud is not in the best of shape, but a new one will have the same slits in it.
What am I missing?
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Old 02-21-2012, 07:58 PM   #2
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Is it the original A/C? If so, check the drain pan for leaks or a plugged drain.

Is your Gray a Congo or a Timneh?

ken
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Old 02-22-2012, 03:25 PM   #3
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Thanks ken,

But I wouldn't know where to look on the darn thing. I think I need a photo, drawing or something to point me in the right direction.

The unit is an original 1975 Coleman Mach "EL" which is one of the first of the Mach series. The "EL" means it has an electric heater in it as well as the AC unit.

African Gray is a Congo. She talks up a storm. We had another Congo as well as a Timneh, but they have other owners now.
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Old 02-22-2012, 04:47 PM   #4
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You will need to go up top and remove the upper shroud. There you will need to look for any tubes or holes coming from out of the sheet metal housing for the evaporator coil. If you can't see anything, you will need to remove a BUNCH of small sheet metal screws to take the top of of the evaporator coils. Once inside, clean the coil and check the drain pan. Reseal the top with the aluminum tape, not duct tape.

A couple of reference links:

RV Air Conditioners made Simple
Low Tech RVing: Air Conditioner Maintenance Part 2: Up on the Roof


Hopefully these will help. You can also pull the inside cover and look up into the unit and see the evaporator coil and part of the drain pan.

Ken
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Old 02-23-2012, 01:51 PM   #5
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Thanks. Very good information!
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