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Old 08-21-2008, 10:53 AM   #1
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Leaky A/C ductwork?

Our Rockwood 5th has ducted A/C.

I have noticed cold air blowing out through the TV antenna handle/mount thing and when up on top I noticed a large amount of cold air blowing out of the refrigerator top vent.

I'm going to go out on a limb here and say I don't think this is normal and there is a disconect somewhere in the A/C ductwork.

Any idea where to start looking for the leak without ripping the entire ceiling out of the rig?
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Old 08-21-2008, 01:45 PM   #2
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I would start by removing the ceiling vents near the fridge area and the ant.
our brand new creek was a disaster at the ac vents. the holes were just punched through and the vents screwed in, with no attention paid to actually sealing the vents.
we spent a few days applying the alum duct tape to seal up the space where the vent runs trhough the attic and the actuall vent opening
is the cold air escaping at the outsde roof opening for the antennea?
hope its a start
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Old 08-21-2008, 02:59 PM   #3
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I agree with powerboatr.
Remove the AC vents in the vicinity and use a mirror to try to see down the
AC trough that runs in the ceiling in the styrofoam.
They may have punched wires thru the AC path and left a hole.
If you fail to see anything via the AC vents then you're back to the roof
to remove the fridge top vent cover and see if you can feel/see the hole
up there.
Duct tape/foam in a can or simply stuff an old WalMart bag in the hole and your
done!!

Our lights and AC vents spew styro balls every time we tow or turn on the AC!!
That damn stuff is so full of static electricity it's nearly impossible to get rid of.
The dust buster is the only way and that's marginally effective.
Good luck finding your air leak.

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Old 08-21-2008, 03:40 PM   #4
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Quote:
Originally Posted by powerboatr View Post
is the cold air escaping at the outsde roof opening for the antennea?
I don't know, but it is escaping to the inside and as I said out the frige chimney vent. The entire "attic" then is pressurized with cold air that isn't getting inside the living space of the trailer. I guess the little round vent things just pop right out?

So no one thinks the leaks are near the A/C unit itself?? That would be good since the inside trim is nicely caulked to the ceiling and I don't want to disturb that.
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Old 08-21-2008, 05:10 PM   #5
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Quote:
Originally Posted by Radio View Post
I don't know, but it is escaping to the inside and as I said out the frige chimney vent. The entire "attic" then is pressurized with cold air that isn't getting inside the living space of the trailer. I guess the little round vent things just pop right out?

So no one thinks the leaks are near the A/C unit itself?? That would be good since the inside trim is nicely caulked to the ceiling and I don't want to disturb that.
our little round vents have three liitle tabs that click the main vent cover n, then the fitting is scrwed into the ceiling
you would be surprised how shoddy the connection is
our attic was so pressurized i found it by mistake, laying under the rea rof the rig, poking around looking for a way to run a wire and felt a blast of cld air.
needless to say i was a bit peeeeeeved
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Old 08-21-2008, 06:35 PM   #6
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If t's anything like ours the ductwork really isn't duct work it's just channels in the styrofoam that they break the dams out of to direct the air around. The grills just pop out. there's a couple of catches that hold them in.
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Old 08-21-2008, 08:20 PM   #7
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If t's anything like ours the ductwork really isn't duct work it's just channels in the styrofoam that they break the dams out of to direct the air around. The grills just pop out. there's a couple of catches that hold them in.
Ahhh! That explains the styrofoam snowstorm we had in the bedroom the first three nights we were out. We made some "diapers" out of cheese cloth and used blue painters tape to tape them over the offending vents.

Still get a pebble now and then.

Well, if nothing else I can sure plug up the gaping hole back there around the fridge. It's one thing to air condition your own attic, another to air condition the entire campground!
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Old 08-21-2008, 08:57 PM   #8
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I think that plumbers use a remote video camera that they can feed through pipes. No doubt many other professions use the same equipment. If I were you I would check that out as a means of discovering holes in your "ducts". The problem, as I see it, is that cold air coming in contact with uninsulated and unsealed attic areas might result in condensation. That, in turn, could possibly result in future problems. In any event, I would consider this to be a factory defect. Best of luck with this issue.
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Old 08-21-2008, 09:59 PM   #9
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I was told by my dealer that they just cut a tunnel out of the styrofoam insulation in the ceiling to form the "ducts" for the ac, which is why you get they snowstorm everytime you tow the trailer and then put the ac on.
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