Your LG aircon showing an error code or flashing LED lights? These signals help identify problems inside your air conditioning system.
Understanding LG error codes helps you know whether the issue is a simple sensor fault or requires professional repair. This guide explains common LG aircon error codes, LED meanings, causes, and solutions for Singapore homes and offices.

How to Read LG Aircon Error Codes

LG air conditioners usually display faults through:

Indoor unit LED blinking patterns
Remote controller error display
Outdoor PCB indicator lights

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

Reading Indoor LED Blinks:

Observe the LED lights for 30 seconds.
Count the first LED blinking number.
Count the second LED blinking number.
Combine both numbers to identify the error code.

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

LG Error Code 5: Communication Failure

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

Possible Causes:

Loose wiring connection
Outdoor unit power issue
Damaged communication cable
PCB fault

Solution:

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

LG Error Code 10: Indoor Fan Motor Fault

This error appears when the indoor fan cannot rotate properly.

Common causes:

Dust buildup
Fan motor damage
Blocked fan wheel
PCB problem

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

LG Error Code 21: IPM / Inverter Fault

Error Code 21 indicates an inverter system problem.

Possible causes:

PCB failure
Compressor overload
Electrical issues

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

LG Error Code 26: Compressor Problem

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

Possible reasons:

Compressor damage
Electrical fault
Refrigerant problems

Avoid continuous operation because compressor damage can become more expensive.

LG Error Code 32: Compressor Temperature High

This error indicates excessive compressor discharge temperature.