Ductless Mini-Split troubleshooting
Mini-Split Leaking Water Indoors? Here's the Fix
A mini-split indoor head that drips is almost always a condensate drainage problem — usually a quick fix.
Common causes
Clogged condensate drain line
Pro repairAlgae and dust clog the drain line so condensation backs up and drips from the unit — the #1 cause.
Failed condensate pump
Pro repairUnits that pump water uphill rely on a small pump that can clog or fail.
Improper drain slope
Pro repairIf the line wasn't installed with enough slope, water won't drain and overflows.
Dirty filters / frozen coil
You can checkClogged filters can freeze the coil; when it thaws, it overflows the drain pan.
What you can check yourself
- Turn the unit off to stop the dripping and protect your wall/floor.
- Clean or rinse the indoor unit's filters (lift the front panel).
- Check that the outdoor end of the drain line isn't blocked or kinked.
- Note whether water also pools at the outdoor unit.
When to call a pro
Clearing a clogged condensate line or servicing the pump is a quick technician job — and worth doing promptly to avoid wall and floor damage.
Most mini-split repairs run $150–$900 — see our repair cost guide.
FAQ
Mini-split leaking water — questions
A mini-split indoor head that drips is almost always a condensate drainage problem — usually a quick fix. The most common causes are clogged condensate drain line, failed condensate pump, improper drain slope.
You can safely check a few things first: Turn the unit off to stop the dripping and protect your wall/floor. Clean or rinse the indoor unit's filters (lift the front panel). Check that the outdoor end of the drain line isn't blocked or kinked. Clearing a clogged condensate line or servicing the pump is a quick technician job — and worth doing promptly to avoid wall and floor damage.
Most mini-split repairs run $150–$900 in the San Francisco Bay Area, parts and labor — you get a flat-rate quote before any work begins. See our repair cost guide for details.
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