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E5

E5 — Indoor anti-frosting protection

Haier · Air Conditioning

What does E5 mean?

The air conditioner has activated its anti-frosting protection, usually because the indoor coil temperature is too low. This can happen if airflow is restricted or if there's an issue with the refrigerant.

Common Causes

  • Faulty pipe temperature sensor
  • Damaged Indoor PCB
  • Faulty indoor fan motor
  • Low refrigerant level

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure air filters are clean and not blocking airflow.

  2. 2

    Check that vents are not blocked.

  3. 3

    Restart the air conditioner.

  4. 4

    If the protection continues to activate, consult a technician.

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 31)Search more codes in this manual