All Haier Air Conditioner error codes

28 codes From brand’s official support

All Haier Air Conditioner error codes

Filter codes on this page…

Code	Meaning	Action
E1	Indoor room temperature sensor fault	Needs a technician
E2	Indoor coil (evaporator) temperature sensor fault	Needs a technician
E4	Memory (EEPROM) error — indoor unit board	Needs a technician
E5	Indoor coil anti-freeze protection	You can usually fix it
E7	Communication error (indoor ↔ outdoor unit)	Needs a technician
E9	High pressure / overload protection	Needs a technician
E14	Indoor fan motor fault	Needs a technician
F1	Inverter board / power module protection	Needs a technician
F2	Overcurrent / compressor overload	Needs a technician
F3	Communication error (power module ↔ main board)	Needs a technician
F4	Compressor overheating	Needs a technician
F6	Outdoor air temperature sensor fault	Needs a technician
F7	Suction pipe temperature sensor fault	Needs a technician
F8	Outdoor fan motor fault	Needs a technician
F11	Compressor start / rotation fault	Needs a technician
F12	Memory (EEPROM) error — outdoor unit board	Needs a technician
F13	Low gas / refrigerant leak or blockage	Needs a technician
F14	4-way (reversing) valve fault	Needs a technician
F19	Power supply voltage problem	You can usually fix it
F20	High pressure / overload protection	Needs a technician
F21	Outdoor coil (condenser) temperature sensor fault	Needs a technician
F22	Overcurrent / compressor overload	Needs a technician
F23	Overcurrent / compressor overload	Needs a technician
F24	Current sensor (CT) fault	Needs a technician
F25	Compressor discharge temperature sensor fault	Needs a technician
F28	Compressor start / rotation fault	Needs a technician
F35	Inverter board / power module protection	Needs a technician
F43	Indoor/outdoor mismatch or wrong wiring	Needs a technician

How to see the error code

Most split ACs show the code on the indoor unit display (e.g. E6, CH05). Some models only blink a light — count the blinks, or press the remote’s check/diagnosis button if your manual mentions one.

How to reset

Switch the AC off with the remote
Turn off the AC’s MCB or wall switch and wait 5–10 minutes
Switch on again and start in cooling mode at 24–26 °C

Sources

We write every explanation in our own words from these references.

Last checked: 2026-10-20

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