LG Error Codes
Every LG error code we have catalogued, with what it means on site — 29 codes in total. In R-Pro, tap any code to get the meaning, likely causes and inspection steps, even with no signal in the plant room.
Common LG codes
- CH01 — Indoor return air thermistor fault
- CH02 — Indoor coil inlet thermistor fault
- CH03 — Wiring error between remote and fan coil
- CH04 — Float switch / fan fault
- CH05 — Indoor–outdoor communication failure
- CH06 — Indoor coil outlet thermistor fault
- CH09 — EEPROM connection issue on main PCB
- CH10 — Indoor fan motor problem
| Code | What it means |
|---|---|
| CH01 | Indoor return air thermistor fault |
| CH02 | Indoor coil inlet thermistor fault |
| CH03 | Wiring error between remote and fan coil |
| CH04 | Float switch / fan fault |
| CH05 | Indoor–outdoor communication failure |
| CH06 | Indoor coil outlet thermistor fault |
| CH09 | EEPROM connection issue on main PCB |
| CH10 | Indoor fan motor problem |
| CH21 | Overcurrent in inverter DC power circuit |
| CH22 | Compressor overcurrent fault |
| CH25 | Incoming power supply error |
| CH26 | Inverter compressor fault (seized) |
| CH27 | Inverter module fault |
| CH28 | Inverter DC voltage too high |
| CH29 | Overload operation or compressor damage |
| CH32 | Compressor discharge temp over 105°C |
| CH38 | Low refrigerant pressure (leak) |
| CH39 | PCB or wiring defect |
| CH41 | Inverter comp discharge thermistor fault |
| CH44 | Outdoor air thermistor fault |
| CH45 | Condenser coil outlet thermistor fault |
| CH46 | Compressor suction thermistor fault |
| CH47 | Inverter comp discharge thermistor fault |
| CH53 | Indoor–outdoor communication (wiring) fault |
| CH61 | Outdoor condenser coil temp over 65°C |
| CH62 | Outdoor inverter heat-sink thermistor fault |
| CH65 | Inverter PCB heat sink thermistor fault |
| CH67 | Outdoor fan motor fault |
| CH73 | Overload operation or compressor damage |
Frequently asked
What does LG error code CH01 mean?
LG error code CH01 means: Indoor return air thermistor fault. In R-Pro you also get the likely causes and the inspection steps — offline.
What does LG error code CH02 mean?
LG error code CH02 means: Indoor coil inlet thermistor fault. In R-Pro you also get the likely causes and the inspection steps — offline.
What does LG error code CH03 mean?
LG error code CH03 means: Wiring error between remote and fan coil. In R-Pro you also get the likely causes and the inspection steps — offline.
What does LG error code CH04 mean?
LG error code CH04 means: Float switch / fan fault. In R-Pro you also get the likely causes and the inspection steps — offline.
What does LG error code CH05 mean?
LG error code CH05 means: Indoor–outdoor communication failure. In R-Pro you also get the likely causes and the inspection steps — offline.
What does LG error code CH06 mean?
LG error code CH06 means: Indoor coil outlet thermistor fault. In R-Pro you also get the likely causes and the inspection steps — offline.
What does LG error code CH09 mean?
LG error code CH09 means: EEPROM connection issue on main PCB. In R-Pro you also get the likely causes and the inspection steps — offline.
What does LG error code CH10 mean?
LG error code CH10 means: Indoor fan motor problem. In R-Pro you also get the likely causes and the inspection steps — offline.
Look up any error code — offline — in R-Pro.
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