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F25

F25 - Cooling/Heating cycle changeover abnormality

Panasonic · Aquarea Heat Pumps

What does F25 mean?

There is an abnormality in the system's cooling or heating cycle changeover. This has occurred 4 times within 30 minutes.

Common Causes

  • 4-way valve fault
  • V-coil fault

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the 4-way valve for proper operation.

  2. 2

    Inspect the V-coil for any issues.

  3. 3

    Ensure the control signals for changeover are correct.

  4. 4

    Contact a qualified installer or service technician for diagnosis.

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 76)Search more codes in this manual