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LG Air Conditioner Error Codes
Every LG Air Conditioner code in the database, with its meaning. Open a code for its causes, the checks to run in order, and how to clear it.
| Code | Meaning | Fix level |
|---|---|---|
CH01also: 01, 1, C1 | Indoor room temperature sensor error | Call a professional |
CH02also: 02, 2 | Indoor coil inlet pipe sensor error | Call a professional |
CH03also: 03, 3 | Wired remote controller communication error | DIY checks first |
CH04also: 04, 4 | Drain pump / float switch error: condensate level too high | DIY checks first |
CH05also: 05, 5, C5 | Communication error between indoor and outdoor units | DIY checks first |
CH06also: 06, 6 | Indoor coil outlet pipe sensor error | Call a professional |
CH07also: 07, 7 | Indoor units set to different operating modes | DIY-friendly |
CH09also: 09, 9 | Indoor unit EEPROM error | Call a professional |
CH10also: 10 | Indoor fan motor lock: fan not turning | DIY checks first |
CH12also: 12 | Indoor coil middle pipe sensor error | Call a professional |
CH21also: 21 | Compressor overcurrent / IPM fault (DC peak) | Call a professional |
CH22also: 22 | Input current too high (CT2 max current) | Call a professional |
CH23also: 23 | DC link voltage too low | Call a professional |
CH24also: 24 | Pressure switch tripped (high or low pressure) | DIY checks first |
CH25also: 25 | Supply voltage too high or too low | DIY checks first |
CH26also: 26 | Inverter compressor position error: compressor not rotating | Call a professional |
CH27also: 27 | PSC fault: inverter protection circuit tripped | Call a professional |
CH28also: 28 | DC link voltage too high | Call a professional |
CH29also: 29 | Compressor input current too high | Call a professional |
CH32also: 32 | Compressor discharge temperature too high (inverter) | DIY checks first |
CH33also: 33 | Compressor discharge temperature too high (fixed-speed) | DIY checks first |
CH35also: 35 | Low pressure sensor error: refrigerant pressure too low | DIY checks first |
CH36also: CH38 | Refrigerant leak detected | Call a professional |
CH38also: CH36 | Refrigerant leak detected | Call a professional |
CH40also: 40 | Current transformer (CT) sensor error | Call a professional |
CH41also: 41 | Compressor discharge pipe sensor error (inverter) | Call a professional |
CH44also: 44 | Outdoor air temperature sensor error | Call a professional |
CH45also: 45 | Outdoor condenser pipe sensor error | Call a professional |
CH46also: 46 | Outdoor suction pipe sensor error | Call a professional |
CH47also: 47 | Compressor discharge pipe sensor error (fixed-speed) | Call a professional |
CH48also: 48 | Outdoor discharge pipe and air sensors disconnected | Call a professional |
CH51also: 51 | Over capacity: too much indoor capacity connected | Call a professional |
CH52also: 52 | Communication error inside the outdoor control board | Call a professional |
CH53also: 53 | Communication error reported by the outdoor unit | DIY checks first |
CH60also: 60 | Outdoor unit EEPROM checksum error | Call a professional |
CH61also: 61 | Condenser coil temperature too high | DIY checks first |
CH62also: 62 | Outdoor inverter heat sink temperature too high | DIY checks first |
CH63also: 63 | Condenser coil temperature too low | Call a professional |
CH65also: 65 | Heat sink temperature sensor error | Call a professional |
CH67also: 67 | Outdoor fan motor lock: fan not turning | DIY checks first |
CL | Child lock is on: not an error | Not a fault |
Other LG appliances
More appliance types are being added. Codes vary by model and region.