Heating and air · checked 5 Oct 2026
The AC is leaking water inside
Safety first
- Turn the thermostat OFF, only if safely reachable.
- Keep away from wet equipment, outlets, and standing water.
- Stay out from under sagging or bulging ceilings.
Fix it nowEight steps
- Set the safely reachable thermostat OFF; set the fan AUTO.Stops cooling; thermostat OFF does not disconnect electrical power.
- Avoid wet equipment and outlets; keep children and pets away.Water near electricity can cause serious shock or fire.
- Catch drips with a bucket, only away from electricity and damaged ceilings.Limits water damage without entering hazardous areas.
The other five steps
- Look for exposed ice without opening equipment; if present, stop and call HVAC.Freezing needs diagnosis; thawing can release more water.
- Replace a dirty, safely accessible return-grille filter with the specified size and type.A clogged filter restricts airflow and can cause freezing.
- Find the confirmed outdoor condensate outlet; skip inaccessible or uncertain drains.Vacuuming the wrong pipe is unsafe; call HVAC if unsure.
- Wet-vacuum that outlet only with dry footing, dry connections, and GFCI-protected power.Suction can remove buildup; never use an ordinary household vacuum.
- Keep cooling OFF until drainage is restored; call HVAC if unresolved.Running a leaking system can worsen water damage.
When to stop
Stop and get a heating and air technician if:
- Water reaches outlets, wiring, or equipment electrical compartments: stay clear; call HVAC and an electrician. Do not restart wet equipment.
- Smoke, sparks, or a burning smell: leave the area and call 911.
- The ceiling sags, bulges, or sheds material: keep everyone out from underneath; call HVAC now. Do not puncture it.
- Visible ice appears: keep cooling OFF and call HVAC. Never chip ice or use a hair dryer.
- The leak continues, the pan is damaged, or access requires opening equipment or unsafe climbing: stop and call HVAC.
What it probably is
Clogged condensate drainWater backs up into the collection pan; the usual drain outlet stops dripping. These clues suggest a blockage, not proof.You can check
Frozen indoor coilVisible ice on exposed tubing, weak airflow, or leaking after cooling stops. Dirty filters or refrigerant problems can cause freezing.For a pro
Cracked or rusted drain panAn already-visible pan has cracks, rust holes, or water escaping underneath. Do not remove equipment covers to inspect it.For a pro
Time and parts
- Time
- About 15–30 minutes for safe checks and an accessible drain attempt; not thawing.
- Parts
- Estimated $0–$30 for a standard filter and supplies, if a wet/dry vacuum is already owned.
Get it done
More than a quick fix? Vora gets quotes privately and recommends one heating and air technician.
Checked against
- Carrier: Why Is My AC Leaking Water?
- Carrier: Will Frozen AC Fix Itself?
- CPSC: Home Electrical Safety Checklist
- Electrical Safety Foundation: Water-Damaged Electrical Equipment
Written for Vora from these public sources and checked on 5 Oct 2026. General guidance, not a substitute for a pro on site. In danger, leave and call 911.