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Old 11-05-2015, 05:58 PM   #1
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Water leak from across vents

When our rooftop ac kicks on, water pours from the front ac vent in the ceiling. It's also leaking from the ac vent over the bed. The rear vent also leaks with heavy rain.
Any ideas on cause? The rear ac gasket was replaced on roof ac when unit was new. 2012 Itasca Ellipse
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Old 11-05-2015, 06:40 PM   #2
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If the gasket was replaced when new, I would suspect the gasket failed again.
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Old 11-06-2015, 09:09 AM   #3
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Your A/C drain vents on the roof could be blocked. Also, it's possible you unit could be freezing and dumping condensation out the air vents.
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Old 11-06-2015, 12:20 PM   #4
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I pulled the inside covers on my AC and the bolts that hold them down had backed off a lot, about 1/4", just tighten them up but mine did not leak. Just part of regular maintenance.
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Old 11-06-2015, 12:42 PM   #5
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Quote:
Originally Posted by 2 Stroker View Post
I pulled the inside covers on my AC and the bolts that hold them down had backed off a lot, about 1/4", just tighten them up but mine did not leak. Just part of regular maintenance.
2 stroker

The correct inch/pound "torque specs" for the roof A/C mounting bolts can be found in the installation and owner's manuals for your particular A/C units.
(I find that I mine need to be re-tighten to those torque specs every 1 or 2 years).
Mel
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Old 11-07-2015, 09:30 PM   #6
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The correct inch/pound "torque specs" for the roof A/C mounting bolts can be found in the installation and owner's manuals for your particular A/C units.
(I find that I mine need to be re-tighten to those torque specs every 1 or 2 years).
Mel
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I thought you just tightened it till it starts turning easier, then backed off a little? . . . No?
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Old 11-08-2015, 07:44 AM   #7
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I thought you just tightened it till it starts turning easier, then backed off a little? . . . No?
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You're joking, right???

If you "tighten", (aka: "rotate clockwise"), the A/C mounting screws they will NEVER "turn easier".... (unless they snap/break).
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Old 11-08-2015, 12:59 PM   #8
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tighten till it clicks right! OH NOOOOOOO
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Old 11-09-2015, 08:31 AM   #9
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Hit_the_Rhod
You're joking, right???

If you "tighten", (aka: "rotate clockwise"), the A/C mounting screws they will NEVER "turn easier".... (unless they snap/break).
Mel
'96 Safari

Yes, I'm joking! turning "easier" again means either stripped, or it's about to break.

My experience is in the aircraft industry. Lots of torque wrenches, different sizes, inch lbs, foot lbs, actually most aircraft parts are torqued to inch lbs instead of ft lbs. They can do that with better quality hardware, finer threads (read expensive), mostly to save weight.

There were applications where the tightness of a component was measured not with a torque wrench, but rather by measuring how much the bolt or fastener actually "stretched" during the tightening process!

Most people in the auto industry figure tightness by whether they use a regular wrench, or if they have to put a 4' cheater bar on it!
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Old 11-10-2015, 01:06 AM   #10
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Originally Posted by ritafreeman7 View Post
When our rooftop ac kicks on, water pours from the front ac vent in the ceiling. It's also leaking from the ac vent over the bed. The rear vent also leaks with heavy rain.
Any ideas on cause? The rear ac gasket was replaced on roof ac when unit was new. 2012 Itasca Ellipse
Our rear ac vent leaks during heavy rain also. I changed the gasket and thought the problem was solved, but it still leaked. It was not the gasket..the water was coming in above the gasket. So I took off the cover and drilled some holes in the channel that already has slots in it for water drainage. I drilled holes in the corners for extra drainage. Still leaked during a downpour.

Next, I took the ac unit out and shimmed up around the 14"X14" opening with 1/2"X2" plywood strips between the aluminum roofing and the styrofoam insulation. I had hoped that this would lift up the ac unit enough to prevent the leak. Nope, still leaks. I can see on the roof where the ac unit's weight has squashed the roof down and water will collect underneath. I m going to have to try to get some thicker (and wider) plywood, maybe an additional 3/4" on top of the 1/2" I used already.
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