LG AC CH01 Error — Indoor Room Temperature Sensor Fault & How to Fix It
CH01 on an LG AC means the indoor room temperature sensor (return-air thermistor) has an open or short circuit. The unit…
LG Air Conditioner Error Codes
Every LG Air Conditioner code we cover — tap a code for the full fix.
LG AC CH02 Error — Indoor Pipe Sensor Fault & How to Fix It
CH02 on an LG AC means the indoor pipe (evaporator) temperature sensor has an open or short circuit. The unit cannot mon…
LG AC CH05 Error — Indoor/Outdoor Communication Fault & How to Fix It
CH05 on an LG AC means the indoor and outdoor units have lost communication. The indoor unit cannot send or receive data…
LG AC CH10 Error — Indoor Fan Motor Fault & How to Fix It
CH10 (also shown as CA on some models) means the indoor fan motor is not running or the discharge temperature has exceed…
LG AC CH21 Error — Inverter DC Overcurrent & How to Fix It
CH21 means the inverter circuit in the outdoor unit has detected excessive DC current. This is a serious electrical faul…
LG AC CH22 Error — Compressor Overcurrent Protection & Fix
CH22 means the compressor itself is drawing excessive current, triggering the overcurrent protection relay.
LG AC CH25 Error — Incoming Power Supply Fault & Fix
CH25 means the outdoor unit has detected an incoming power supply error — voltage is outside the acceptable range or pha…
LG AC CH26 Error — Inverter Compressor Fault & Fix
CH26 means the inverter compressor has a fault — typically a winding failure, ground fault, or the compressor has seized…
LG AC CH27 Error — Inverter Module (IPM) Fault & Fix
CH27 means the Intelligent Power Module (IPM) on the outdoor inverter PCB has failed or is overheating.
LG AC CH32 Error — Compressor Discharge Temperature Too High & Fix
CH32 means the compressor discharge temperature has exceeded approximately 105 degrees C. The unit stops to protect the…
LG AC CH34 Error — High Pressure Switch Fault & Fix
CH34 means the high-pressure switch on the outdoor unit has tripped — refrigerant pressure on the discharge side is dang…
LG AC CH35 Error — Low Pressure Fault & Fix
CH35 means the low-pressure sensor or switch has detected abnormally low refrigerant pressure — the system may be leakin…
LG AC CH38 Error — Low Refrigerant or Electrical Fault & Fix
CH38 means the system has detected low refrigerant pressure or an electrical fault. The AC stops to protect the compress…
LG AC CH41 Error — Discharge Thermistor Sensor Fault & Fix
CH41 means the inverter compressor discharge temperature sensor (thermistor) on the outdoor unit is faulty — open or sho…
LG AC CH44 Error — Outdoor Air Temperature Sensor Fault & Fix
CH44 means the outdoor ambient air temperature thermistor is faulty — open or short circuit.
LG AC CH45 Error — Condenser Coil Outlet Sensor Fault & Fix
CH45 means the condenser coil outlet temperature sensor (thermistor) on the outdoor unit has an open or short circuit.
LG AC CH47 Error — Electronic Expansion Valve (EEV) Fault & Fix
CH47 means the electronic expansion valve (EEV) or its thermistor sensor on the outdoor unit is faulty.
LG AC CH61 Error — Condenser Coil Overtemperature & Fix
CH61 means the outdoor condenser coil temperature has exceeded approximately 65 degrees C. The unit stops to prevent hig…
LG AC CH62 Error — Inverter Heat-Sink Sensor Fault & Fix
CH62 means the inverter heat-sink temperature sensor (thermistor) on the outdoor PCB is faulty — open or short circuit.
LG AC CH67 Error — Outdoor Fan Motor Fault & Fix
CH67 (also shown as EF on some models) means the outdoor fan motor is not running or is locked. Without the outdoor fan,…