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8H-02

8H-02 — Overheating mixed water circuit (thermostat)

Daikin · ASHP Error Codes

What does 8H-02 mean?

The mixed water circuit is overheating, and the issue is potentially related to the thermostat.

Common Causes

  • Malfunctioning thermostat for the mixed water circuit
  • Incorrect temperature readings
  • System imbalance

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the thermostat settings and its connection.

  2. 2

    Ensure the thermostat is correctly positioned.

  3. 3

    Reset the unit by turning off power for 60 seconds.

  4. 4

    A qualified technician should diagnose thermostat issues.

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