Ductless Mini-Split in Greater Boston

A mini-split leaking water inside usually means the condensate water isn’t draining, so turn the system off to stop damage and have the drain path checked. The most common cause is a clogged drain line or dirty filter that lets the coil ice up and then drip when it thaws; wrong unit pitch or a failed condensate pump can also push water indoors. I often find the drain hose sagging behind wall units, which forms a hidden trap that only overflows on humid days. Our licensed technicians handle these fixes routinely in the Concord area, and we offer emergency repair when the leak is active.

If you want quick checks before a visit:

• Power off, place a container or towel, and don’t run cooling until inspected.
• Rinse or replace the indoor filter if it’s dirty.
• Look for kinks/algae at the drain outlet; if there’s a pump, see if it runs.
• Schedule service if stains, repeats, or electrical issues appear.

Shut the system off and book a diagnostic if you see ongoing dripping or ceiling staining to avoid water damage.

Updated: 2026-05-09

Need help in Concord, MA? Call (781) 933-7878 or book online.