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Ceiling vents leaking water

Posted on 7/3/21 at 3:00 pm
Posted by Tboy13
Member since Oct 2015
137 posts
Posted on 7/3/21 at 3:00 pm
My ceiling vents started to drip water over the last few days. Several have water stains around them now. Most recent one this afternoon needed a bucket under the drip.

I went and thoroughly checked the attic and there’s nothing leaking from the roof. Seems like condensate forming, but why all of a sudden? Why to the point of requiring a bucket to catch the leak?
Posted by wickowick
Head of Island
Member since Dec 2006
45810 posts
Posted on 7/3/21 at 3:31 pm to
Checks your upstream ducts for a joint failure that is allowing humid air into the ducts
Posted by Jimbeaux
Member since Sep 2003
20116 posts
Posted on 7/3/21 at 3:35 pm to
Do you have a window open? If you have double sash windows, the top window could have slipped down an inch. The hot air would stay up along the ceiling and wouldn’t be very noticeable, but would produce a lot of condensation.
Posted by BobABooey
Parts Unknown
Member since Oct 2004
14283 posts
Posted on 7/3/21 at 3:43 pm to
I woke up one night to a smoke alarm going off and investigated. Water was dripping down from the smoke alarm and I guess shorted it out in a way to make it go off. I went into the attic and saw that the condensation pan had overflowed and the water eventually flowed to the spot with the smoke alarm, puddled there, and eventually started dripping through to the living area below. The water flowed below the blown insulation so it was tough to see.

It sounds like you checked for a roof leak so I hope this isn’t a waste of your time but consider that possibility although a condensation issue is sounds more likely.
Posted by CrawDude
Baton Rouge
Member since Apr 2019
5267 posts
Posted on 7/3/21 at 4:12 pm to
Could be multiple reasons including those stated by others - leak in return air ducts, open window, etc. I’ll throw in another - could be a possible harbinger of low refrigerant charge resulting in colder air exiting the supply registers, or a restricted HVAC air filter causing the same thing -colder air supply registers, etc.

Read this article that explains the cause and areas to start looking. Do you have the means to check air temperature exiting your supply registers (vents) and relative humidity in your house?

Why Do Air Conditioning Vents Sweat
This post was edited on 7/3/21 at 4:39 pm
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