LG is a well-known name in the air conditioning world, offering smart, efficient, and high-performing split ACs. Like most modern air conditioners, LG split ACs are equipped with a self-diagnostic system that displays error codes to help users and technicians identify problems quickly.

In this guide, we’ll walk you through the most common LG split AC error codes, what they mean, and how to fix them.

❓ What Are LG Error Codes?

LG error codes are alphanumeric indicators shown on the AC display panel or remote controller. They help diagnose problems like sensor issues, communication failures, or motor faults, ensuring faster maintenance and repair.

📋 LG Split AC Error Code List with Descriptions & Solutions

1. CH01 – Indoor Air Thermistor Error

• Description: Fault in the room temperature sensor.
• Solution:
  • Turn off the AC and restart it.
  • Check if the sensor is loose or damaged.
  • Replace the sensor if needed.

2. CH02 – Indoor Pipe Thermistor Error

• Description: The sensor reading coil temperature is faulty or disconnected.
• Solution:
  • Inspect the coil sensor wiring.
  • Replace the thermistor if defective.

3. CH03 – Outdoor Pipe Thermistor Error

• Description: Temperature sensor in the outdoor unit is malfunctioning.
• Solution:
  • Check the sensor connection and placement.
  • Replace the sensor if broken or shorted.

4. CH04 – Outdoor Discharge Thermistor Error

• Description: The discharge pipe temperature sensor has failed.
• Solution:
  • Inspect the outdoor unit for wiring issues.
  • Replace faulty sensor.

5. CH05 – Communication Error Between Indoor & Outdoor Units

• Description: Indoor and outdoor units are not communicating.
• Solution:
  • Turn off the power supply for 5 minutes and restart.
  • Inspect connection cables and PCB boards.
  • Call a technician if issue persists.

6. CH06 – Indoor Fan Motor Error

• Description: The fan motor is malfunctioning or not spinning.
• Solution:
  • Clean the fan blades.
  • Check for blockages and wiring issues.
  • Replace the motor if faulty.

7. CH09 – EEPROM Error in Indoor Unit

• Description: The memory chip on the indoor unit PCB has failed.
• Solution:
  • Power cycle the unit.
  • If the issue returns, the indoor PCB may need replacement.

8. CH10 – Outdoor Fan Motor Error

• Description: Fan motor in the outdoor unit is not working correctly.
• Solution:
  • Clean the fan and check motor operation.
  • Replace motor if it doesn’t run.

9. CH38 – Low Refrigerant or System Leakage

• Description: System has detected low refrigerant or a possible leak.
• Solution:
  • Do not use the AC continuously with this error.
  • Call a certified technician to check gas pressure and recharge if needed.

10. CH60 – Indoor Unit Float Switch Error

• Description: Indicates water drainage issue or blocked drain pipe.
• Solution:
  • Clean the drainage pipe and check water flow.
  • Inspect float switch operation and replace if needed.

✅ Preventive Maintenance Tips

• Clean the filters every 2 weeks.
• Ensure proper ventilation for both indoor and outdoor units.
• Use a voltage stabilizer to protect your AC from electrical surges.
• Avoid overuse during peak hours to reduce stress on components.
• Schedule professional servicing at least once a year.

📞 When Should You Call an Expert?

Contact a technician if:

• You see the same error repeatedly after restarting.
• The AC unit is not cooling or making unusual sounds.
• You notice water leakage, gas smell, or tripping power.

🔚 Conclusion

Understanding these LG split AC error codes helps you troubleshoot issues efficiently and know when to seek professional support. While minor issues can often be solved with a reset or cleaning, more serious problems require expert attention.

Need help with your LG AC? Contact LG’s customer support or your nearest authorized service center for quick and reliable assistance.

---