Searching for LG AC error code list? This article provides you with a comprehensive list of LG air conditioner fault codes, also known as LG error codes. You can see the error code in your remote control if your LG air conditioner isn’t functioning properly.
The latest LG inverter ACs have a fascinating feature called “Smart Diagnosis.” The machine can self-detect installation and usage errors thanks to this feature. The indoor unit display or the remote control option will flash an error code if there is a problem with the device.
These codes can guide you in identifying the issue and give the AC technician the information they need to determine the best course of action. The error code will appear in the air conditioner if the LG air conditioner you have does not have a remote control.
In this article, we’ll go over some of the error codes that are most frequently seen. Users should note that all LG AC models will not display all these errors.
LG inverter air conditioner error codes:
| c1 or ch1 | Indoor temperature sensor open or closed circuit |
| c2 or ch2 | Outdoor temperature sensor open or closed circuit |
| c4 or ch4 | Heat sink temperature sensor open or closed circuit |
| c5 or ch5 | Communication indoor and outdoor units |
| c6 or ch6 | Excessive current at inverter DC power circuit |
| c7 or ch7 | Excessive compressor current |
| c8 or ch8 | Indoor fan not rotating |
| c9 or ch9 | Outdoor fan not rotating |
| ca or ch10 | Faulty discharge thermistor |
| cc | EEPROM error |
| cd | Inverter module error |
| po | System in power mode ( not a fault ) |
| lo | System in test mode ( not a fault ) |
LG AC Indoor Unit Error Code List
| Error Code | Description |
| 1 | Indoor unit room temperature sensor error |
| 2 | Indoor unit inlet pipe sensor error |
| 3 | Wired remote control error |
| 4 | Float switch error |
| 5 | Communication errors between the indoor and outdoor units |
| 6 | Indoor unit outlet pipe sensor error |
| 9 | Indoor unit EEPROM error |
| 10 | Indoor unit BLDC fan motor lock |
| 12 | Indoor unit middle pipe sensor error |
LG AC Outdoor Unit Error Code List
| Error Code | Description |
| 21 | DC Peak (IPM) Fault – Compressor DC voltage is too high |
| 22 | CT2 (Max CT) – Alternating current input too high |
| 23 | DC Link Low Voltage |
| 25 | AC Low/High Voltage |
| 26 | DC Comp Position Error (not providing rotation – locking) |
| 27 | PSC Fault – Current to inverter compressor between AC and DC converter is too high |
| 28 | Inverter Compressor DC voltage is too high |
| 29 | Comp Phase Over-current – Inverter compressor amperage is too high |
| 31 | Current-to-current transformer (CT) thermistor is too low |
| 32 | Inverter Compressor Discharge pipe overheat |
| 34 | High-pressure sensor high |
| 35 | Low-pressure sensor low |
| 36/38 | Refrigerant Leak detection |
| 37 | Exceed the compression ration limit |
| 40 | CT sensor error – Thermistor is disconnected or shorted out |
| 41 | Discharge Pipe sensor error – INV is disconnected or shorted out |
| 42 | Low-Pressure sensor error |
| 43 | High-Pressure sensor error |
| 44 | Outdoor air sensor error – Disconnected or shorted out |
| 45 | Condenser middle pipe sensor error – Disconnected or shorted out |
| 46 | Suction pipe sensor error – Disconnected or shorted out |
| 48 | Outdoor unit coil outlet (liquid line) thermistor is disconnected or shorted out |
| 51 | Excess capacity – Mismatch between IDU and ODU |
| 53 | Communication error – between the IDU and ODU |
| 60 | Outdoor unit printed circuit board (PCB) EEPROM checksum error |
| 61 | Condenser coil temperature is too high |
| 62 | Heat sink sensor temperature – high |
| 63 | Condenser coil pipe thermistor temperature is low |
| 65 | Heat sink thermistor has disconnected or shorted out |
| 67 | BLDC motor fan lock |
| 72 | Detect 4-way valve transfer failure |
| 93 | Communication error |
Other LG AC 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. |
