All LG Air Conditioner error codes

28 codes From brand’s official support

All LG Air Conditioner error codes

Filter codes on this page…

Code	Meaning	Action
CH0101	Indoor room temperature sensor fault	Needs a technician
CH0202	Indoor coil (evaporator) temperature sensor fault	Needs a technician
CH0505	Communication error (indoor ↔ outdoor unit)	Needs a technician
CH0606	Indoor coil outlet temperature sensor fault	Needs a technician
CH0909	Memory (EEPROM) error — indoor unit board	Needs a technician
CH1010	Indoor fan motor fault	Needs a technician
CH1212	Indoor coil middle temperature sensor fault	Needs a technician
CH2121	Inverter board / power module protection	Needs a technician
CH2222	Overcurrent / compressor overload	Needs a technician
CH2323	Inverter board / power module protection	Needs a technician
CH2525	Power supply voltage problem	You can usually fix it
CH2626	Compressor start / rotation fault	Needs a technician
CH2727	Overcurrent / compressor overload	Needs a technician
CH2828	Inverter board / power module protection	Needs a technician
CH2929	Overcurrent / compressor overload	Needs a technician
CH3232	Compressor overheating	Needs a technician
CH4040	Current sensor (CT) fault	Needs a technician
CH4141	Compressor discharge temperature sensor fault	Needs a technician
CH4444	Outdoor air temperature sensor fault	Needs a technician
CH4545	Outdoor coil (condenser) temperature sensor fault	Needs a technician
CH4646	Suction pipe temperature sensor fault	Needs a technician
CH4848	Outdoor liquid-pipe temperature sensor fault	Needs a technician
CH5353	Communication error (indoor ↔ outdoor unit)	Needs a technician
CH6060	Memory (EEPROM) error — outdoor unit board	Needs a technician
CH6161	Outdoor unit overheat protection	You can usually fix it
CH6262	Inverter board / power module protection	Needs a technician
CH6565	Inverter heat-sink temperature sensor fault	Needs a technician
CH6767	Outdoor fan motor fault	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.

LG Help Library — Single / Multi-Split Air Conditioner Error Codes

Last checked: 2026-10-20

Air Conditioner brands

Samsung AC Voltas AC Daikin AC Blue Star AC Lloyd AC Haier AC Panasonic AC Gree AC