LG RangeOven Error Codes

LG ranges and ovens are designed for efficient cooking performance, but error codes may sometimes appear due to operational issues. Understanding these codes can help diagnose and resolve problems swiftly. In some cases, replacing essential LG Range & Oven Parts may be necessary to restore optimal functionality. Below is a comprehensive guide to common LG range and oven error codes, their possible causes, and effective troubleshooting solutions.

1. Error Code F1 - Opened Sensor

Issue: The oven sensor (thermistor) remains open for over 1 minute during cooking.

Possible Causes & Solutions:

• A faulty oven temperature sensor may be the cause. Try resetting the appliance by unplugging it for a few minutes and then restarting.

• If the error persists, inspect the sensor wiring for damage and replace it if necessary.

2. Error Code F2 - Shorted Sensor

Issue: The oven sensor (thermistor) is shorted for over 1 minute during cooking.

Possible Causes & Solutions:

• A defective oven sensor may need replacement.

• Check the sensor connection and ensure there are no loose or broken wires.

• Reset the oven by unplugging it for a few minutes before turning it back on.

3. Error Code F3 - Key Shorted Error

Issue: Some keys remain continuously shorted for over 60 seconds.

Possible Causes & Solutions:

• A stuck or faulty keypad can trigger this error. Clean the control panel and check if any button is jammed.

• If the problem continues, replacing the touchpad or control board may be necessary.

4. Error Code F6 - Oven Hot 

Issue: The oven temperature exceeds 650°F continuously for 2 minutes during cooking (except in self-cleaning mode).

Possible Causes & Solutions:

• This could indicate a faulty temperature sensor or thermostat. Inspect and replace if needed.

• Check the oven control board for malfunctions.

• Reset the oven by unplugging it for 5 minutes before restarting.

5. Error Code F - No Heating

Issue: The oven temperature does not exceed 150°F within 5 minutes of preheating while the door is closed.

Possible Causes & Solutions:

• Check the heating element or burner for faults and replace if necessary.

• Inspect the oven sensor and wiring connections.

• Ensure proper power supply and voltage to the appliance.

6. Error Code F8 - Probe Sensor Short

Issue: A short error was detected in the right oven probe sensor.

Possible Causes & Solutions:

• The temperature probe may be faulty or have a short circuit. Try replacing the probe.

• Check the probe connection to ensure it is securely plugged in.

7. Error Code F10 - Door Lock Fail

Issue: The door lock mechanism fails during operation.

Possible Causes & Solutions:

• A faulty door lock motor or switch may be the problem. Inspect and replace if necessary.

• Ensure that the door latch is not obstructed or misaligned.

8. Error Code - F11 Communication Error

Issue: Communication error between the cooktop PCB and oven PCB occurs for over 10 seconds in self-clean mode.

Possible Causes & Solutions:

• A loose or faulty wiring connection between the cooktop and oven PCB may be the issue. Inspect and secure the wiring.

• Reset the oven and check if the error clears. If not, a replacement PCB may be needed.

9. Error Code CF1 - LF Top Sensor Open/Short 

Issue: The left front (LF) top sensor is either open or shorted.

Possible Causes & Solutions:

• Inspect the LF sensor for any damage or disconnection. Replace it if necessary.

• Check the wiring harness for loose connections.

10. Error Code CF2 - LR Top Sensor Open/Short 

Issue: The left rear (LR) top sensor is either open or shorted.

Possible Causes & Solutions:

• Inspect the LR sensor and replace it if faulty.

• Ensure proper wiring connections to the sensor module.

For persistent issues, always consult your LG Range & Oven user manual or contact an authorized LG service technician for professional assistance.

11. Error Code CF3 - RF Top Sensor Open/Short 

Issue: The RF (Right Front) top sensor is either open or shorted. 

Possible Causes & Solutions:

• Check the wiring connection of the RF top sensor and secure any loose connections.

• If the sensor is faulty, replace it with a compatible part.

12. Error Code CF4 - RR Top Sensor Open/Short 

Issue: The RR (Right Rear) top sensor is either open or shorted. 

Possible Causes & Solutions:

• Inspect the sensor for damage or disconnection.

• Reconnect or replace the RR top sensor if necessary.

13. Error Code CF5 - Left IGBT Sensor Open/Short 

Issue: The left IGBT (Insulated Gate Bipolar Transistor) sensor is either open or shorted. 

Possible Causes & Solutions:

• Verify the sensor’s connection and wiring.

• Replace the left IGBT sensor if it is defective.

14. Error Code CF6 - Right IGBT Sensor Open/Short 

Issue: The right IGBT sensor is either open or shorted. 

Possible Causes & Solutions:

• Inspect the wiring for damage and reconnect any loose cables.

• Replace the right IGBT sensor if it is malfunctioning.

15. Error Code CF7 - Left Communication Error

Issue: Communication error at the left module. 

Possible Causes & Solutions:

• Check for loose or damaged wiring between the left module and the control board.

• If the issue persists, consider replacing the control module.

16. Error Code CF8 - Right Communication Error 

Issue: Communication error at the right module. 

Possible Causes & Solutions:

• Ensure all wiring connections to the right module are secure.

• Replace the module if necessary.

17. Error Code CFA - Over Current 

Issue: Excessive current detected. 

Possible Causes & Solutions:

• Inspect the power supply and control board for abnormalities.

• If the issue persists, a technician should evaluate the range for potential electrical faults.

18. Error Code CFC - Over Voltage 

Issue: Overvoltage detected at the cooktop. 

Possible Causes & Solutions:

• Verify that the power supply is within the recommended voltage range.

• Consider using a voltage regulator if fluctuations are common.

19. Error Code CFF - Box Fan Error 

Issue: The box fan is not working properly. 

Possible Causes & Solutions:

• Ensure the fan is not obstructed by debris or grease buildup.

• If the fan is defective, replace it with a compatible unit.

20. Error Code F7 - Convection Fan Error 

Issue: The convection fan cannot be detected for over 1 minute while operating. 

Possible Causes & Solutions:

• Check if the convection fan motor is functioning.

• Clean or replace the fan if it is not spinning properly.

• Inspect and replace the fan wiring or control board if needed.

21. Error Code F27 - Stalled Fan Lock Error

Issue: Cooling fan is stalled during self-clean.
Possible Causes & Solutions:

• The cooling fan may be obstructed or defective. Inspect for debris and clean if necessary.

• If the issue persists, the fan motor may need replacement. Contact LG support for further assistance.

22. Error Code F1F4 - Sensor Open

Issue: Oven thermistor is open.

Possible Causes & Solutions:

• A disconnected or faulty oven temperature sensor can trigger this error. Check the sensor connection and wiring.

• Replace the thermistor if it is damaged.

23. Error Code F2F5 - Sensor Short

Issue: Oven thermistor is shorted.

Possible Causes & Solutions:

• A shorted oven temperature sensor can cause inaccurate temperature readings. Inspect the sensor and replace it if needed.

24. Error Code F6F16 - Oven Hot

Issue: Oven temperature exceeds 650°F for more than 2 minutes during cooking (except self-clean).

Possible Causes & Solutions:

• A faulty oven sensor may be causing overheating. Check and replace if necessary.

• The control board may be malfunctioning. A reset or replacement might be required.

25. Error Code F18 - Probe Short

Issue: Lower oven probe is shorted.

Possible Causes & Solutions:

• Check the oven probe connection for damage or disconnection.

• If the probe is defective, replace it with a compatible LG probe.

26. Error Code F9F19 - Oven Not Heating

Issue: The oven does not heat up more than 10°F within 5 minutes (except in Proof or Warm mode).

Possible Causes & Solutions:

• A faulty heating element or igniter can cause this issue. Inspect and replace as needed.

• Check the oven's power supply to ensure proper voltage.

27. Error Code F10F20 - Door Lock Fail

Issue: The door lock fails while operating the lock motor.

Possible Causes & Solutions:

• A faulty door lock mechanism may need replacement.

• Check the wiring and connections for any loose or damaged parts.

28. Error Code F4 - Oven Sensor Open

Issue: The oven thermistor remains open for more than 60 seconds after cooking starts.

Possible Causes & Solutions:

• A disconnected or broken sensor may cause this error. Inspect and replace the sensor if necessary.

29. Error Code F5 - Oven Sensor Short

Issue: The oven thermistor remains shorted for more than 60 seconds after cooking starts.

Possible Causes & Solutions:

• A shorted sensor may cause inaccurate temperature readings. Replace the sensor to restore proper functionality.

30. Error Code F16 - Oven is Hot

Issue: Oven temperature exceeds 650°F continuously for more than 2 minutes during cooking (except self-cleaning).

Possible Causes & Solutions:

• A defective temperature sensor or control board can lead to overheating. Inspect and replace as needed.

• Avoid using high heat settings for extended periods to prevent overheating issues.

31. Error Code  F19 - Oven Not Heating

Issue: The oven is not heating, except in specific modes such as Proof, Warm, SpeedClean, SteamClean, Drying, Descaling, and SousVide.

Possible Causes & Solutions:

• Case 1: If the start temperature does not exceed 130°F, the oven temperature is less than or equal to 150°F, and the max oven temperature does not rise more than 10°F above the start temperature within 5 minutes while preheating with the door closed.

• Solutions

• Ensure the oven door is properly closed.

• Check the oven heating element for any damage or failure.

• Restart the oven and try preheating again.
  
  

• Case 2: If the oven temperature is below 100°F after 5 minutes of preheating with the door closed.
  
  

• Solutions

• Inspect and replace the heating element if faulty.

• Check the power supply and ensure the oven is receiving adequate voltage.

32. Error Code  F20 - Door Lock Failure

Issue: The door lock motor fails while operating.

Possible Causes & Solutions:

• The door lock mechanism may be obstructed or malfunctioning.

• Power cycle the oven by unplugging it for a few minutes and then restarting.

• Inspect the door lock assembly for damage and replace it if necessary.

• If the issue persists, contact LG support for further assistance.

33. Error Code F24 - Steam Sensor Open

Issue: The steam thermistor remains open for 10 seconds after the steam heater has operated for 5 minutes.

Possible Causes & Solutions:

• A faulty or disconnected steam sensor.

• Check the wiring connections of the steam thermistor and reconnect if loose.

• If the thermistor is defective, replace it.

• Reset the oven and attempt to operate the steam function again.

34. Error Code F25 - Steam Sensor Short

Issue: The steam thermistor remains shorted for over 60 seconds after the steam heater has operated.

Possible Causes & Solutions:

• A defective or short-circuited steam thermistor.

• Inspect the thermistor wiring for any signs of damage or short circuits.

• Replace the thermistor if it is determined to be faulty.

• Reset the oven by unplugging it for a few minutes before trying again.