Aircon water leaking indoors: what to check before approving repairs

Indoor water leaks can look urgent, but the right response depends on the leak pattern and timing. A one-off drainage issue and a recurring freeze-thaw issue do not carry the same risk.

Primary question

My indoor unit is leaking water. Is this urgent, and what should I verify first?

Sort the leak pattern first

The same wet wall can come from different failure paths. Timing gives the fastest clue.

  • Leak starts only after long runtime: often drainage load or airflow decline
  • Leak appears right after recent service: verify service-step quality first
  • Leak repeats after temporary fixes: treat as unresolved root-cause risk

Common causes that should be checked in sequence

Good checks should separate drain issues from deeper cooling problems.

  • Drain line flow and blockage behavior
  • Coil condition and airflow restrictions that can trigger icing
  • Tray alignment and installation slope for proper runoff

When to get urgent help

Get urgent help if water is reaching sockets, false ceilings, or interior walls even after recent work.

In Singapore humidity, repeat indoor leaks can worsen quickly if the root cause is not fixed.

Need help with your own unit?

Tell us what is happening. We will assess first, advise one clear next step, and you decide.

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