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Water flowing sound

Water flowing sound during operation — Refrigerant flow

Panasonic · Aquarea Heat Pumps

What does Water flowing sound mean?

You may hear a water-like flowing sound from the unit. This is normal and caused by refrigerant circulating within the system.

Common Causes

  • Normal operation of the refrigerant.
  • System is actively heating or cooling.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    This is a normal operating sound and does not typically require intervention.

  2. 2

    Ensure the unit is installed on a level surface to minimize noise.

  3. 3

    If the sound is excessively loud or sudden, contact your installer.

Browse all codes in this manual (69)
Verified technical data. Last updated: April 2026

Related Faults

2 beeps then pause2 beeps then pause - Overfill warning3 red flashes3 red flashes - Communication errorError Code DisplayError Code Display - Abnormality detected
Source: Panasonic Aquarea Heat Pumps
Open Manual (Page 18)Search more codes in this manual