Window or Wall AC Leaking Water Indoors

Water dripping inside usually means a blocked drain channel, a dirty filter, or a unit that is not tilted correctly.

By Dana WhitfieldSeptember 29, 20253 min read read

Written by Wade Holbrook, Lead Technician — True Fix Dallas. Factory-trained, EPA-certified, 9 years servicing Dallas–Fort Worth.

A small amount of condensate is normal; water pooling indoors is not. Here is why it happens.

Clear the Drain Channel

Algae and dust block the condensate path, so water backs up inside.

Fix: Clean the drain channel and the weep hole at the base.

A window unit must sit slightly lower at the back so water drains outdoors.

Fix: Adjust the mounting so the rear is a touch below the front.

A clogged filter ices the coil; when it melts, it overwhelms the drain.

Fix: Clean the filter monthly to prevent ice buildup.

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