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89-06

89-06 — Heat exchanger freeze-up protection activated during cooling operation. (warning)

Daikin · ASHP Error Codes

What does 89-06 mean?

A warning that the heat exchanger may be freezing during the cooling operation.

Common Causes

  • Dirty evaporator coil
  • Low outdoor temperature during cooling mode
  • Refrigerant leak

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Clean the indoor unit's evaporator coil.

  2. 2

    Ensure the unit is operating within its recommended temperature range.

  3. 3

    Check for signs of refrigerant leaks.

  4. 4

    If the warning persists, contact a service professional.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

7H-017H-01 — Water flow problem7H-047H-04 — Water flow problem during domestic hot water production7H-057H-05 — Water flow problem during heating/sampling
Source: Daikin ASHP Error Codes
Open Manual (Page 2)Search more codes in this manual