San Antonio · AC condensate leaks

AC drain line leak water damage

San Antonio's long cooling season means air conditioners make a lot of condensate. When the drain line clogs, water spills into the attic, a closet or the ceiling below. We can refer you to an independent water damage company. Provider availability varies.

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Ceiling stain under an attic air handler after a condensate overflow

Why this is so common here

Most of the year, local AC units run hard and produce steady condensate. Many homes put the air handler in the attic, with a primary drain line and a secondary drain pan. Dust, algae and sludge clog the line, the pan fills, and water goes into insulation and drywall. Homes in Universal City, Medical Center, Stone Oak and Alamo Ranch see this often.

Warning signs

Water dripping from a ceiling near the HVAC closet
A float switch that shut the AC off, or an AC that will not stay on
A full or rusty secondary drain pan under the air handler
Wet insulation around the unit
A musty smell upstairs after the AC has been running

First steps

If water is actively dripping, turn the thermostat off to stop more condensate.
Place a bucket under the drip if you can reach it safely.
Check the secondary pan and the drain line cleanout (often a T-shaped PVC fitting near the unit or outside).
Photograph the pan, the stain and the wet insulation.
Call an HVAC tech for the clog and a water damage company if the ceiling, insulation or flooring is wet.

What drying usually includes

Standing water is extracted, wet insulation is removed, drywall that stayed wet is cut out to a dry edge, and air movers plus dehumidifiers dry the joists and deck. Moisture readings decide when new insulation and drywall can go back. See attic water damage and water heater & AC leaks.

Prevention

Pour distilled vinegar through the cleanout a few times a year, or follow your HVAC tech's maintenance plan
Make sure the float switch works
Replace dirty filters so the coil does not ice and then dump water
Keep the attic access clear so a tech can reach the unit quickly

📞 Call for a Referral(844) 609-3992

Questions homeowners ask

Will the AC keep leaking after the drain is cleared?

Once the clog is cleared and the pan is empty, new condensate should go down the drain again. Any wet materials still need to be dried.

Is an AC condensate leak covered by insurance?

Sudden overflow from a clog is often covered. Poor maintenance arguments come up on claims, so photos and a tech's note help.

Can I clear the drain myself?

Many homeowners clear a simple clog at the cleanout. If you are not comfortable on an attic ladder, or water already reached the ceiling, call a pro.

Can I call at night or on a weekend?

You can call the referral line any time and we will try to connect you. Same-day and 24/7 emergency services are subject to provider participation, location, technician availability, and demand. Availability is not guaranteed.

Honest disclosure: SATX Water Damage Help is a referral service and is not a contractor. We connect San Antonio-area callers with independent local water damage restoration and mold remediation companies. We do not perform the work and do not guarantee pricing or availability. Calls are routed to independent, licensed service providers who may record calls. Same-day and 24/7 emergency services are subject to provider participation, location, technician availability, and demand. Availability is not guaranteed. Always verify a company's licensing (Texas requires a state license for mold remediation), insurance, and references before hiring.