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AC Leaking Water Inside

Water inside from an AC unit usually means a clogged condensate drain or full drain pan. Clearing the drain line is often DIY; pump or pan repairs run $150–$450 professionally.

Reviewed July 2026

What does ac leaking water inside mean?

The indoor evaporator coil produces condensate that drains away through a PVC line. Algae, rust, or debris clogs the line and water overflows into your home. High-efficiency furnaces share the same drain on combined systems.

What usually causes ac leaking water inside?

Clogged condensate drain linemost common

Typical repair: $150–$450

Full or rusted drain pancommon

Typical repair: $150–$450

Failed condensate pumpcommon

Typical repair: $150–$450

Find your exact error code

Select your furnace brand to jump to the code page for this symptom.

Rheem61Blower failed to runRuud61Blower failed to runDaikin3 FlashPressure-switch circuit did not closeYork12 BlinksIgniter circuit fault

What should I check first when ac leaking water inside?

  1. Turn off the AC to stop water production.
  2. Locate the condensate drain line and check for clogs.
  3. Vacuum or flush the drain trap if accessible.
  4. Call a pro if the pan is rusted through or the pump isn't running.

What a repair costs

A condensate pump replacement typically costs between $150 and $450 nationally.

Typical repair cost
$150 – $450condensate pump replacement
Where the money goes
Part $50–$150Labor $0–$400Typical labor time: 0.5–1 hrs

This is general information, not professional advice. Gas, electrical, and combustion repairs can be dangerous — when in doubt, call a licensed technician.