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F23

F23 (25 flashes) — Compressor U/V/W phase overcurrent

Haier · Air Conditioning

What does F23 mean?

This error indicates overcurrent in one of the phases (U, V, or W) powering the compressor. This is a serious electrical issue.

Common Causes

  • Faulty Power Module
  • Refrigerant issues
  • Damaged compressor

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the power supply for 1 minute, then restart the unit.

  2. 2

    Verify the power supply voltage is correct.

  3. 3

    If the error persists, a technician must inspect the Power Module, compressor, and refrigerant.

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 32)Search more codes in this manual