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Old 07-28-2011, 11:02 PM   #1
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36 RE bedroom AC dripping water

We noticed two different times that the second AC in our bedroom leaks water on the bed. Doesn't do it all the time. Anyone experience this? Is it a condensation issue? Temperatures have been in 100s, terribly hot. I know the unit is working super hard to keep it cool. I've attached an image of where it drips water. I can, without a doubt, rule out any roof leak bc we haven't had any rain in months.

We took the panel down to check inside and noticed the ducting connecting the blower hole to the outlet hole had fallen loose from the blower hole. We attached it. We also noticed the hole cut in the plastic piece at the top of the accordion ducting was small so we cut it to enlarge it for better flow. Remembered reading something about that mod in the forum.
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Old 07-29-2011, 06:57 AM   #2
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I would look at how you are using it or the drain system on the ac itself.

As you run the AC water vapor in the air will condense on the coils and drip into the collecting basin (under the ac unit). There should be a drain hole(s) in the collecting basin that allow that water to run out onto the roof. If mud, leaves, or bugs (spiders) block that hole, or holes, water can fill the basin and with nowhere to go will then enter the air intake or exhaust and drip inside.

or

The thermostat should be set NO LOWER than 10 degrees below the outside air temperature (good advice for your house too). This should allow the AC to cycle on and off and remove any frost or ice that forms on your cooling coils.

Once there is frost on the coils (from setting the AC to 65 degrees and running it constantly) air flow through the fins begins to drop off and the frost becomes ice. This further reduces air flow and the ice spreads until the AC is ice bound. No air flow yet the AC is running constantly. The hot air will melt water from the block of ice on the outside while the cooling fins keep the ice in contact with them frozen. With no place to go, that dripping water can enter the air plenum and drip on you.

My best guesses anyway.
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Old 07-31-2011, 01:16 PM   #3
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We just got back from camping this weekend and we tried your thermostat suggestion. Kept it set where it wouldn't constantly run but still comfortable temperature. No water leaking anywhere. So not sure if our modification and fix to the duct solved it or your suggestion. But none the less, situation seems resolved with cleaning drains in top of roof. Thanks for the feedback.
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Old 07-31-2011, 01:17 PM   #4
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Oops. Meant to say seems resolved WITHOUT having to clean drains on roof.
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