LG Electronics, a South Korean company known globally for its innovative home appliances, is a major player in the air conditioning industry. LG air conditioners are particularly popular in Singapore for their advanced technology, energy efficiency, and sleek design. These are the ultimate top 3 most purchased LG aircon units in Singapore:
- LG DualCool Inverter Air Conditioner is one of LG’s bestsellers in Singapore, thanks to its energy-efficient Dual Inverter Compressor that adjusts cooling power to maintain consistent temperatures with minimal power usage.
- Known for its unique design, the LG ArtCool series doubles as a cooling system and a decorative piece with customizable front panels. This model is popular in Singapore’s modern homes and offices where aesthetics are valued alongside functionality.
- LG Multi V S (VRF System) is a top choice for commercial spaces and larger homes. With high cooling performance and advanced dehumidification features, the Multi V S is perfect for Singapore’s humid environment.
LG’s strong reputation for durability, innovative features, and user-friendly design has made its air conditioners highly favored in Singapore’s market, meeting both residential and commercial cooling needs effectively. But it doesn't mean that your LG’s aircon might not run into problems sometimes.
But worry not, because in this complete LG error code guide, we’ll show you the different codes and possible causes affecting LG aircon units — and how you can use them to check and troubleshoot the common issues with your LG air conditioner.
LG Air Conditioner Error Codes: The Complete List
Indoor Unit Faults
| Error Code |
Possible Cause |
LED1 (Heating LED) |
LED2 (Cooling LED) |
| 1 |
Indoor unit room temperature sensor error |
1 blink |
0 blinks |
| 2 |
Indoor unit inlet pipe sensor error |
2 blinks |
0 blinks |
| 4 |
Drain pump / Float switch error (optional) |
4 blinks |
0 blinks |
| 5 |
Communication error between indoor unit and outdoor units |
5 blinks |
0 blinks |
| 6 |
Indoor unit outlet pipe sensor error |
6 blinks |
0 blinks |
| 9 |
Indoor unit EPROM error |
9 blinks |
0 blinks |
| 10 |
Indoor unit BLDC motor fan lock |
0 blinks |
1 blink |
| 12 |
Indoor unit middle pipe sensor error |
2 blinks |
1 blink |
| 21 |
DC Peak (IPM Fault); Compressor DC voltage was too high |
2 blinks |
1 blink |
| 22 |
Current Transformed (CT2) error; Alternating current (AC) input too high |
2 blinks |
2 blinks |
| 23 |
DC Link Low Voltage |
2 blinks |
3 blinks |
| 25 |
AC Low/High Voltage |
2 blinks |
5 blinks |
| 26 |
DC Comp Position Error (not providing rotation), Locking |
2 blinks |
6 blinks |
| 27 |
PSC Fault; Current to inverter compressor between AC and DC converter circuit too high |
2 blinks |
7 blinks |
| 28 |
Inverter compressor DC voltage is too high |
2 blinks |
8 blinks |
| 29 |
Inverter compressor amperage is too high |
2 blinks |
9 blinks |
| 31 |
Current-to-current transformer (CT) thermistor is too low |
3 blinks |
1 blink |
| 32 |
Inverter Compressor Discharge Pipe (D-Pipe) Overheat |
3 blinks |
2 blinks |
| 40 |
CT Sensor Error; Thermistor is disconnected or shorted out |
4 blinks |
0 blinks |
| 41 |
D-Pipe Sensor INV is disconnected or shorted out |
4 blinks |
1 blink |
| 44 |
Outdoor Air Sensor is disconnected or shorted out |
4 blinks |
4 blinks |
| 45 |
Middle thermistor of outdoor unit condenser coil is disconnected or shorted out |
4 blinks |
5 blinks |
| 46 |
Outdoor unit suction line thermistor is disconnected or shorted out |
4 blinks |
6 blinks |
| 48 |
Outdoor unit coil outlet (liquid line) thermistor is disconnected or shorted out |
4 blinks |
8 blinks |
| 53 |
Communication failure from outdoor unit to indoor unit |
5 blinks |
3 blinks |
| 60 |
Outdoor unit printed circuit board (PCB) EEPROM check sum error |
6 blinks |
0 blinks |
| 61 |
Outdoor unit condenser coil temperature is too high |
6 blinks |
1 blink |
| 62 |
Outdoor unit inverter compressor PCB heat sink temperature is too high |
6 blinks |
2 blinks |
| 63 |
Condenser coil pipe thermistor temperature is too low |
6 blinks |
3 blinks |
| 65 |
Heat sink thermistor has disconnected or has shorted out |
6 blinks |
5 blinks |
| 67 |
Outdoor brushless direct current (BLDC) fan motor lock error |
6 blinks |
7 blink |
Outdoor Unit Faults
| Error Code |
Possible Cause |
LED1 (Green) |
LED2 (Red) |
| 21 |
DC Peak (IPM Fault); Compressor DC voltage was too high |
2 blinks |
1 blink |
| 22 |
Current Transformed (CT2) error; Alternating current (AC) input too high |
2 blinks |
2 blinks |
| 23 |
DC Link Low Voltage |
2 blinks |
3 blinks |
| 24 |
Low / High Pressure |
2 blinks |
5 blinks |
| 25 |
AC Low/High Voltage |
2 blinks |
5 blinks |
| 26 |
DC Comp Position Error (not providing rotation), Locking |
2 blinks |
6 blinks |
| 27 |
PSC Fault; Current to inverter compressor between AC and DC converter circuit too high |
2 blinks |
7 blinks |
| 28 |
Inverter compressor DC voltage is too high |
2 blinks |
8 blinks |
| 29 |
Inverter compressor amperage is too high |
2 blinks |
9 blinks |
| 31 |
Current-to-current transformer (CT) thermistor is too low |
3 blinks |
1 blink |
| 32 |
Inverter Compressor Discharge Pipe (D-Pipe) Overheat |
3 blinks |
2 blinks |
| 33 |
Discharge pipe (cons.) overheat |
3 blinks |
3 blinks |
| 34 |
High-pressure sensor high |
3 blinks |
4 blinks |
| 35 |
Low-pressure sensor low |
3 blinks |
5 blinks |
| 36 |
Refrigerant leak detection |
3 blinks |
6 blinks |
| 37 |
Compression ratio limit exceeded |
3 blinks |
7 blinks |
| 38 |
Refrigerant leak detection |
3 blinks |
8 blinks |
| 39 |
Communication error |
3 blinks |
9 blinks |
| 40 |
CT Sensor Error; Thermistor is disconnected or shorted out |
4 blinks |
0 blinks |
| 41 |
D-Pipe Sensor INV is disconnected or shorted out |
4 blinks |
1 blink |
| 44 |
Outdoor Air Sensor is disconnected or shorted out |
4 blinks |
4 blinks |
| 45 |
Middle thermistor of outdoor unit condenser coil is disconnected or shorted out |
4 blinks |
5 blinks |
| 46 |
Outdoor unit suction line thermistor is disconnected or shorted out |
4 blinks |
6 blinks |
| 48 |
Outdoor unit coil outlet (liquid line) thermistor is disconnected or shorted out |
4 blinks |
8 blinks |
| 53 |
Communication failure from outdoor unit to indoor unit |
5 blinks |
3 blinks |
| 60 |
Outdoor unit printed circuit board (PCB) EEPROM check sum error |
6 blinks |
0 blinks |
| 61 |
Outdoor unit condenser coil temperature is too high |
6 blinks |
1 blink |
| 62 |
Outdoor unit inverter compressor PCB heat sink temperature is too high |
6 blinks |
2 blinks |
| 63 |
Condenser coil pipe thermistor temperature is too low |
6 blinks |
3 blinks |
| 65 |
Heat sink thermistor has disconnected or has shorted out |
6 blinks |
5 blinks |
| 67 |
Outdoor brushless direct current (BLDC) fan motor lock error |
6 blinks |
7 blink |
Other Error Codes
| Error Code |
Possible Cause |
Solution |
| Code appears in the display. F1,F2 or F3 |
Air conditioner is in FAN mode and the number shown is the set fan speed. |
This is normal. The air conditioner is working properly. |
| FL |
The water collection tank is full. |
Empty the water collection tank. |
| CH01 |
Short or open circuit in the indoor air thermistor. |
Unplug the air conditioner and contact your authorized LG service center. |
Also read: Carrier AC Error Codes
Still facing some issues with your LG air conditioner? Don’t forget to check your warranty before scheduling any repairs! If your LG air conditioner is still covered, you might be eligible for free repairs or parts replacement. For any issues with your LC aircon, you should follow the steps here to request a repair.
If your warranty has expired or you prefer expert servicing, you can consider reaching out to Luce. We offer reliable aircon repairs and maintenance, ensuring your LG air conditioner unit stays in top condition!
For more information about LG air conditioning error codes, feel free to consult the following links for additional reference:
If you have other problems with your LG air conditioning unit, then you can check out our article about LG aircon troubleshooting.
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