Leaking mini-split: drain line cleared and outdoor coil cleaned
Last updated Reviewed by Waseem Shahzad, Lead Technician
Commack, NYMini-Split ServiceTechnician: WaseemMay 2026
A mini-split was leaking water indoors. The drain line was not draining; we cleared it with nitrogen and chemically cleaned the outdoor unit.
What the homeowner reported
The homeowner reported a leaking mini-split.
What we found
The drain line was not draining properly, which sent water out of the indoor unit. The outdoor unit also needed cleaning.
What we did
Waseem cleared the drain line with nitrogen, then performed a chemical cleaning of the outdoor coil with the jacket removed, and cleaned the drain.
The result
With the drain cleared and the coil cleaned, the mini-split was working properly.
Job details are from our May 2026 service record for this Commack home. Customer details are left out.
General information, not details from this job
About mini-split drain leaks
Every indoor mini-split removes water from the air while it cools, and that water has to run out through a small drain line. Dust, algae or a sag in the line can stop it, and the water then drips from the indoor unit onto the wall or floor. Blowing the line clear with nitrogen pushes out the blockage without chemicals in the house. Cleaning the outdoor coil at the same time keeps the system running at normal pressures, so it cools and dehumidifies the way it should.
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