Water Leaking from Your AC
Air conditioners produce a surprising amount of water. On a humid Columbus day, a residential system can pull several gallons of condensate out of the indoor air, and all of it has to leave the house through a drain line.
When water shows up where it should not, the cause is nearly always drainage, ice, or a pan problem — and in attic installations, it can become a ceiling repair very quickly.
Common symptoms
- Water pooling around the base of the indoor unit
- Brown staining on a ceiling below an attic air handler
- Water in the secondary or emergency drain pan
- Dripping outside from the emergency overflow line
- System shutting itself off intermittently
Common causes
- Clogged condensate drain line from algae and biological growth
- Rusted or cracked drain pan
- Frozen evaporator coil melting faster than the pan can drain
- Disconnected or improperly sloped drain piping
- Failed condensate pump on systems that need one
- Missing or dry drain trap allowing air to block flow
What a professional may inspect
- Drain line clearing and flow testing
- Primary and secondary pan condition
- Trap configuration and slope
- Float switch function
- Coil condition and evidence of freezing
- Condensate pump operation and check valve
Safe homeowner checks
- Turn the system off to stop adding water
- Look for a capped cleanout near the indoor unit and check for standing water
- Verify the drain outlet outside is dripping during operation
- Check for ice on the coil, which points to a freezing issue instead
- Place towels or a shallow pan and protect flooring while waiting
Safety note: Do not open electrical compartments, handle refrigerant, bypass safety devices, or attempt electrical repairs unless properly qualified.
When to call right away
- Water reaching drywall, ceilings, insulation, or electrical components
- Water in the emergency pan of an attic unit
- Any sign of mold growth or a persistent musty smell near the air handler
*Service availability depends on provider participation, location, technician availability, current demand, and appointment capacity.
Why this matters in Columbus
Georgia's humidity means condensate volume here is high all summer, and warm attics make drain lines a hospitable place for algae. In Columbus, drain-line clogs are one of the single most common midsummer service calls, and attic air handlers make them expensive when the float switch is missing or bypassed.
AC Water Leak FAQs
Why is water leaking around my indoor AC unit?
The most common reason is a clogged condensate drain line that causes the pan to overflow. A frozen coil, cracked pan, failed condensate pump, or improperly sloped drain piping can produce the same symptom.
Can I clear the drain line myself?
Some homeowners carefully apply suction at the outdoor drain outlet with a wet/dry vacuum. It sometimes works. If the clog is deep, the pan is rusted, or the unit is in an attic above finished ceilings, that is worth handling professionally.
Why is water leaking around my air handler?
Most often a blocked condensate drain, a cracked or corroded pan, a loose drain connection, or a coil that froze and is now thawing. Shut the system off to stop producing condensate, protect what is below, and arrange an inspection.
How do I know if my condensate drain is clogged?
Common indicators are water in the emergency pan, water near the indoor unit, a system that shuts down on its own during cooling, a musty smell, or a drain termination that has stopped dripping outdoors on a humid day when it normally does.
Related residential services
AC Drain Line Repair
Clogged condensate lines, overflowing pans, and float switches shutting systems down.
Read moreFrozen AC / Ice on Unit
Ice on the indoor coil or the copper suction line means the system needs to be shut down.
Read moreAir Handler Repair
Indoor unit faults: blower motors, control boards, coils, drain pans, and cabinet leaks.
Read moreAC Maintenance
Seasonal service that keeps airflow, drainage, and electrical components ahead of failure.
Read moreService areas near you
Need AC Help Tonight?
Cooling problem after normal business hours? Emergency AC repair options are available for Columbus homeowners around the clock.
*Service availability depends on provider participation, location, technician availability, current demand, and appointment capacity.