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E9

E9 — Indoor unit overload in heating mode

Haier · Air Conditioning

What does E9 mean?

This error signals that the indoor unit is overloaded while operating in heating mode. This could be due to issues with the refrigerant pipes or the fan motor.

Common Causes

  • Faulty pipe temperature sensor
  • Damaged Indoor PCB
  • Faulty indoor fan motor

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify that the indoor unit's fan is running correctly.

  2. 2

    Ensure there are no obstructions around the indoor unit.

  3. 3

    Restart the air conditioner.

  4. 4

    Contact a technician if the overload condition persists.

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