Why is my mini-split leaking water?
Most leaks come from a blocked condensate drain line, a failed condensate pump, a drain pan that's dirty or tilted, or an iced coil melting faster than it can drain. A mini-split pulls a lot of water out of the air as it cools; when that water can't leave through the drain, it comes out of the front of the indoor unit.
Florida makes this worse. The Florida Climate Center describes typical summer dew points around 70°F and overnight humidity above 90% — so the drain carries water almost every hour the unit runs, and algae and debris have plenty of time to build up. If you need someone to clear it, our Florida mini-split referral line connects you with a technician who works on ductless systems.
Is a leaking mini-split dangerous?
It's rarely an emergency, but don't ignore it. ENERGY STAR warns that a plugged condensate drain can cause water damage in the house and affect indoor humidity, and the U.S. Department of Energy lists mold growth from plugged condensate drains as an occupant health hazard. Water running down a wall can also reach outlets and drywall.
What can I safely do right now?
- Turn the unit off and put a towel or container under the drip.
- Check the filters. A clogged filter can let the coil ice up; when the ice melts, it overwhelms the pan. See cleaning & maintenance.
- Look at the outside end of the drain line. If it's buried in mulch, kinked or crushed, that may be the whole problem.
- Listen for the pump. If your head drains with a small pump (common when it's on an inside wall), a silent pump or one that runs constantly is a clue to mention on the call.
Leave the inside of the unit to a technician — the pan, coil and electronics sit right next to each other.
What will a technician do?
Expect them to clear the line (often by flushing or vacuuming it), clean the drain pan, check the line's slope and trap, and test or replace the condensate pump. If the coil was icing, they'll also look for the reason — dirty coil, airflow or low refrigerant. A deep clean of the indoor head is often recommended at the same visit.
Water on the outside unit — is that normal?
Some dripping from the outdoor unit is normal, especially in heat mode when it defrosts. Water coming from the indoor head is not. If you also see the unit struggling to cool, mention both on the call.