How to Read LG Aircon Error Codes

LG air conditioners usually display faults through:

Most residential LG units in Singapore use LED blinking to show error numbers.

Example:

LED1 blinks 6 times + LED2 blinks 1 time = Error Code 61

Common LG Aircon Error Codes

Error Code	Problem	Severity
1	Indoor temperature sensor fault	Medium
2	Pipe sensor fault	Medium
5	Indoor-outdoor communication error	High
6	Indoor pipe sensor fault	Medium
9	Indoor PCB memory error	High
10	Indoor fan motor problem	High
21	Inverter PCB/IPM fault	High
26	Compressor rotation problem	High
32	Compressor overheating	High
41	Compressor sensor fault	Medium
53	Communication failure	High
60	Outdoor PCB error	High
61	Outdoor coil overheating	High
67	Outdoor fan motor fault	High

Error Code 5 is one of the most common LG aircon problems in Singapore.

Check power supply and wiring connections. If the problem continues, professional diagnosis is required.

This error appears when the indoor fan cannot rotate properly.

Common causes:

Cleaning may solve minor issues, but damaged motors require replacement.

Error Code 21 indicates an inverter system problem.

Possible causes:

This is a serious fault and should be checked by a trained technician.

This code means the inverter compressor is unable to operate normally.

Possible reasons:

Avoid continuous operation because compressor damage can become more expensive.

This error indicates excessive compressor discharge temperature.

Common causes:

Professional inspection is recommended.