Call 24/7
Menu

AC Leaking Through the Ceiling? What to Do First

A dripping ceiling near the air handler or a return vent usually means the AC's condensate drain has backed up. Here's what to do, in order.

Published · Sun City Ceiling Water Damage Help

Call (623) 301-8959

Short answer: turn the AC off at the thermostat, catch the drip, keep away from wet light fixtures, and check whether the ceiling is sagging. Then get two things handled: an HVAC technician to clear the drain, and a water cleanup provider to dry the ceiling and insulation.

Step by step

  1. Turn the AC off at the thermostat. While it runs, it keeps producing water.
  2. Catch the water. Bucket, towels, and a plastic sheet over furniture or flooring.
  3. Check for sagging. If the ceiling bulges or droops, leave the room and keep others out. See sagging ceilings.
  4. Stay away from wet fixtures. Only switch off a circuit if you can reach the breaker panel from a dry spot.
  5. Take photos of the ceiling and any visible water around the indoor unit.
  6. Call for help: an HVAC technician for the drain, and (623) 301-8959 for water cleanup and drying.

Heat warning: going without air conditioning in an Arizona summer can be dangerous, especially for older adults. If the house gets hot while you wait for repairs, go somewhere cool.

Why AC units leak into ceilings

An air conditioner pulls moisture out of indoor air. That water collects in a drain pan under the indoor coil and runs out through a condensate line. When the line clogs, often with algae or debris, the pan can overflow. If the air handler sits in the attic, the overflow lands on the ceiling below. In the Phoenix area, where AC runs most of the year, a slow clog has a long time to build up.

Signs it's the AC and not the roof

  • The stain is near the air handler, a return grille or a supply vent
  • It shows up on a dry, sunny day while the AC is running
  • The system shut off by itself (some units have a float switch that stops them when the pan is full)
  • Water around the indoor unit or in its closet

Stains that appear during or right after rain point to the roof instead. See roof leak water cleanup.

Why the ceiling needs drying, not just paint

AC leaks are often slow, so water can soak insulation and drywall for days before a stain shows. The EPA recommends drying water-damaged areas within 24 to 48 hours to prevent mold. A drying provider checks with moisture meters, removes soaked insulation if needed, and dries the area with dehumidifiers and air movers. Painting comes later, once readings confirm everything is dry.

How to lower the chance it happens again

  • Have the condensate drain checked during routine AC maintenance
  • Ask your HVAC technician whether your system has a float switch or secondary drain pan
  • Look at the area around the indoor unit now and then, especially in summer

Need the water cleaned up?

Call (623) 301-8959, 24 hours a day, 7 days a week. Sun City Ceiling Water Damage Help is a referral line that connects Sun City callers with independent water cleanup and drying providers. AC repair itself is done by an HVAC technician.

Get help in Sun City

AC Leak Water Cleanup

Cleanup and drying after a clogged AC drain overflows into ceilings or floors.

Sagging Ceiling Water Damage

Emergency help when a ceiling is holding water: release, cleanup and drying.

Wet Drywall & Ceiling Drying

Professional drying for walls and ceilings soaked by a recent leak.

Water coming through the ceiling? Call now.

Calls are answered 24 hours a day, 7 days a week. We connect you with an independent, local water damage provider who serves Sun City. You decide whether to hire them.

Call (623) 301-8959Free to call. Any inspection, quote or work is between you and the provider.
Call 24/7: (623) 301-8959