Most AC leaks come from a clogged condensate drain line or a cracked drain pan. Turn the AC off, stop the leak, and dry ceilings and attic insulation quickly to prevent mold. Service the drain line yearly.
Why it happens so often here
Houston air conditioners run most of the year and produce gallons of condensate. Algae and debris clog the drain line, the pan overflows and water soaks insulation and ceiling drywall.
Early warning signs
A ceiling stain below the attic unit, water in the pan, an AC that shuts off because a float switch trips, or a musty smell.
What to do
Turn off the AC, clear standing water, call an HVAC technician and dry the ceiling and attic. See AC leak water damage in Houston and ceiling water damage repair.
Prevent the next one
Install a secondary pan and float switch, flush the drain line regularly and schedule yearly service.
Need help now
Use Houston water damage restoration to be connected.
Frequently asked questions
Can AC leaks cause mold?
Yes if insulation and drywall stay wet.
Is it covered?
Sometimes. Sudden overflow is more likely than gradual seepage.
Sources and further reading
- EPA: Mold Cleanup in Your Home
- IICRC: Institute of Inspection, Cleaning and Restoration Certification
Related services

AC Leak Water Damage
Condensate overflow and clogged drain lines from Houston air conditioners.
Learn more
Roof and Ceiling Leak Water Damage
Drying and cleanup after leaks through the roof, attic or ceiling.
Learn moreGeneral information, not legal, insurance or engineering advice. Water Damage Restoration Houston does not perform the work.
