Quick answer: In South Florida, a leaking AC is most often caused by a clogged condensate drain line, usually from algae and sludge that grow in the humid drain. Other causes include a rusted or cracked drain pan, a frozen evaporator coil that drips as it thaws, a failed condensate pump, or a disconnected drain line. Turn the system off if water is pooling and have the drain cleared before it damages ceilings or floors.
Your air conditioner removes a lot of moisture from the air in humid West Palm Beach, often gallons per day. That water is supposed to flow out through a drain line. When it can’t, it ends up on your floor, in your ceiling, or in the closet around the air handler.
5 common causes of AC water leaks
1. Clogged condensate drain line
This is the number one cause in Florida. Warm, damp drain lines are perfect for algae and slime. Many systems have a float switch that shuts the AC off when the drain backs up, so a sudden shutdown plus water in the pan is a strong clue.
2. Rusted or cracked drain pan
Older metal pans rust through over time. Water then leaks out of the pan instead of into the drain.
3. Frozen evaporator coil
Restricted airflow from a dirty filter, or low refrigerant from a leak, can make the coil freeze. When it thaws, more water drips than the pan can handle.
4. Failed condensate pump
Air handlers in some homes and condos use a small pump to push water out. If the pump fails, water overflows.
5. Disconnected or damaged drain line
A line that has come loose, cracked, or was installed without proper slope will leak.
What you can safely check
- Replace the air filter if it’s dirty
- Look for water in the drain pan under the air handler
- Check whether the float switch has shut the system off
- Look for ice on the refrigerant lines or coil; if you see ice, turn the AC off and let it thaw
When to call a technician
Call if water keeps returning after you’ve changed the filter, if the coil freezes, if the drain pan is rusted, or if water has reached ceilings, drywall or floors. A technician can clear the drain properly, check refrigerant levels, and replace a failed pan or pump.
How to prevent leaks
- Have the condensate drain flushed during every tune-up
- Change filters every 1 to 3 months
- Schedule maintenance twice a year with a maintenance plan
Learn more about AC repair in West Palm Beach.
Water leaking from your AC? Call Cool Moon AC Refrigeration And Appliance Inc at (786) 306-2025, open 24 hours a day, 7 days a week across West Palm Beach and Palm Beach County.
