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26

Error Code 26 — PCB reset

Haier · Air Conditioning

What does 26 mean?

This indicates the main circuit board (PCB) has reset. This often happens when the system experiences low line voltage conditions.

Common Causes

  • Low line voltage conditions
  • Power supply instability
  • Internal PCB anomaly

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the incoming line voltage to ensure it is within the specified operating range.

  2. 2

    Verify that the power supply to the unit is stable and not fluctuating.

  3. 3

    Inspect electrical connections for looseness.

  4. 4

    If low voltage is the persistent issue, consult your power provider.

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 26)Search more codes in this manual