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17

Error Code 17 — 4-way valve switching failure

Haier · Air Conditioning

What does 17 mean?

The 4-way valve, which directs hot gas flow for heating or cooling, is not switching correctly. This prevents the system from changing modes properly.

Common Causes

  • Faulty 4-way valve
  • Electrical issue with the valve control
  • Incorrect valve position

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Refer to the 4-way valve testing procedure in the manual.

  2. 2

    Check the electrical connections to the 4-way valve.

  3. 3

    Ensure the valve is receiving the correct signals from the PCB.

Browse all codes in this manual (103)
Verified technical data. Last updated: April 2026

Related Faults

1Error Code 1 — Outdoor PCB EEPROM fault10Error Code 10 — Defrost sensor fault11Error Code 11 — Compressor suction temperature sensor fault
Source: Haier Air Conditioning
Open Manual (Page 22)Search more codes in this manual