LG Mini-Split Error Codes
Complete list of LG mini-split error codes with causes and how to fix them.
CH01
🟢
LG Mini-Split error code CH01: Indoor unit inlet temperature sensor failure.
✓ DIY Possible
CH02
🟢
LG Mini-Split error code CH02: Indoor unit outlet temperature sensor failure.
✓ DIY Possible
CH03
🟢
LG Mini-Split error code CH03: Outdoor unit discharge temperature sensor …
✓ DIY Possible
CH04
🟢
LG Mini-Split error code CH04: Outdoor unit inlet temperature sensor failure.
✓ DIY Possible
CH05
🟢
LG Mini-Split error code CH05: Outdoor unit outlet temperature sensor failure.
✓ DIY Possible
CH06
🟢
LG Mini-Split error code CH06: Outdoor ambient temperature sensor failure.
✓ DIY Possible
CH07
🟢
LG Mini-Split error code CH07: Outdoor unit suction temperature sensor failure.
✓ DIY Possible
CH10
🟢
LG Mini-Split error code CH10: Indoor fan motor fault.
✓ DIY Possible
CH12
🟢
LG Mini-Split error code CH12: Outdoor fan motor fault (DC motor).
✓ DIY Possible
CH15
🔴
LG Mini-Split error code CH15: Overcharge or blocked expansion valve.
Technician Required
CH16
🟡
LG Mini-Split error code CH16: Compressor overcurrent protection.
Technician Required
CH17
🟡
LG Mini-Split error code CH17: DC peak current protection.
Technician Required
CH21
🔴
LG Mini-Split error code CH21: High pressure protection (compressor off).
Technician Required
CH22
🔴
LG Mini-Split error code CH22: Low pressure protection (compressor off).
Technician Required
CH23
🟡
LG Mini-Split error code CH23: Discharge temperature protection.
Technician Required
CH24
🟢
LG Mini-Split error code CH24: Indoor unit flooding — clogged drain.
✓ DIY Possible
CH25
🟢
LG Mini-Split error code CH25: Drain pump fault.
✓ DIY Possible
CH26
🟢
LG Mini-Split error code CH26: Outdoor unit condenser high temp protection.
✓ DIY Possible
CH27
🟡
LG Mini-Split error code CH27: Communication error between indoor/outdoor.
Technician Required
CH28
🟡
LG Mini-Split error code CH28: PFC overcurrent protection.
Technician Required
CH29
🟡
LG Mini-Split error code CH29: Compressor startup failure.
Technician Required
CH32
🟡
LG Mini-Split error code CH32: IPM (power module) protection.
Technician Required
CH33
🟡
LG Mini-Split error code CH33: Outdoor PCB failure.
Technician Required
CH34
🟡
LG Mini-Split error code CH34: Fan motor position sensor failure.
Technician Required
CH38
🟡
LG Mini-Split error code CH38: 4-way valve malfunction.
Technician Required
CH41
🟡
LG Mini-Split error code CH41: Indoor PCB malfunction.
Technician Required
CH44
🟢
LG Mini-Split error code CH44: Indoor unit overcurrent protection.
✓ DIY Possible
CH45
🟡
LG Mini-Split error code CH45: AC input overcurrent protection.
Technician Required
CH46
🟡
LG Mini-Split error code CH46: BLDC motor position sensor failure.
Technician Required
CH67
🔴
LG Mini-Split error code CH67: DC link low voltage protection.
Technician Required