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Water Flow Sound

Sound of water flowing from unit - Refrigerant or condensed water movement

Mitsubishi Electric · MSZ-AP Air Conditioners

What does Water Flow Sound mean?

A sound resembling water flowing is heard from inside the unit.

Common Causes

  • Movement of refrigerant within the piping system.
  • Movement of condensed water draining from the unit.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    This is a normal operational sound and is not a malfunction of the air conditioner; no action is required.

  2. 2

    The sound is typically associated with the internal circulation of fluids necessary for cooling or heating.

  3. 3

    Continue using the air conditioner as normal.

Browse all codes in this manual (87)
Verified technical data. Last updated: April 2026

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Source: Mitsubishi Electric MSZ-AP Air Conditioners
Open Manual (Page 17)Search more codes in this manual