If you own an LG range oven, you may encounter an error code at some point. These codes can indicate a variety of issues, from minor problems that can be easily resolved to more serious issues that may require professional repair.
In this blog post, we will explain the meaning of common LG range oven error codes and provide troubleshooting tips to help you fix the issue yourself.
LG Range Oven Error Codes
Remember to always unplug the range and exercise caution when attempting any repairs.
F1: Upper sensor open error
The F1 error appears when an open circuit in the upper thermistor is detected.
Related error code:
- F2: An upper sensor short error appears when a short circuit of the upper thermistor is detected.
Causes:
- Faulty wire harness
- Faulty upper thermistor
- Faulty main board
Soulutions:
- Check the upper sensor wire harness connection to the board.
- Check the thermistor resistance using a multimeter.
| Electric part name | Temperature | Ohmic value |
|---|---|---|
| Upper sensor | 25˚C/77°F | 1.09 kΩ |
- Check and replace, if necessary, the main board.
F3: Keypad short error
The F3 error indicates that communication between the keypad and the controller is blocked.
Causes:
- Faulty harness connector
- Faulty Display (Touch) board or control panel board
- Faulty main board
Solutions:
- Check the harness on the main board.
- Check and replace, if necessary, the display board.
- Check and replace, if necessary, the main board.
F4: Lower sensor open error
The F4 error appears when an open circuit in the lower thermistor is detected.
Related error code:
- F5: A lower sensor short error appears when a short circuit of the lower thermistor is detected.
Causes:
- Faulty wire harness
- Faulty lower thermistor
- Faulty main board
Solutions:
- Check the lower sensor wire harness connection to the board.
- Check the thermistor resistance using a multimeter.
| Electric part name | Temperature | Ohmic value |
|---|---|---|
| Lower sensor | 25˚C/77°F | 1.09 kΩ |
- Check and replace, if necessary, the main board.
F6: Hot oven error
The F6 error indicates a problem with the upper part of the oven being over 343°C for two minutes during cooking.
Causes:
- Faulty thermistor
- Stuck relay
- Faulty main board
Solutions:
- Check the thermistor.
| Electric part name | Temperature | Ohmic value |
|---|---|---|
| Oven sensor | 25˚C/77°F | 1.09 kΩ |
- Check the relay.
- Check and replace, if necessary, the main board.
F7: Convection fan error
The F7 error indicates a problem with the convection fan.
Causes:
- Faulty wire harness connector
- Faulty fan motor.
- Faulty fan relay
- Faulty main board
Solutions:
- Check the harness on the main board.
- Check the fan motor.
| Electric part name | Low-speed coil ohmic value | High-speed coil ohmic value |
|---|---|---|
| Convection fan | 29 Ω | 24 Ω |
- Check the relay.
- Check and replace, if necessary, the main board.
F8: Meat probe short error
The F8 error appears when a short circuit in the meat probe is detected.
Causes:
- Faulty wire harness
- Faulty meat sensor
- Faulty main board
Solutions:
- Check the meat sensor wire harness connection to the board.
- Check the sensor resistance using a multimeter.
| Electric part name | Temperature | Ohmic value |
|---|---|---|
| Meat probe | 25˚C/77°F | 1.09 kΩ |
- Check and replace, if necessary, the main board.
F9: Oven not heating error
The F9 error indicates a problem with the upper part of the oven not heating up by 5°C from its initial temperature within five minutes after cooking starts.
Causes:
- Faulty wire harness connector
- Faulty thermistor
- Open heating element relay
- Faulty main board
Solutions:
- Check the harness on the main board.
- Check the thermistor resistance.
- Check the heating element resistance by using a multimeter.
| – | Upper broil | Lower broil | Upper bake | Conv. Heater |
|---|---|---|---|---|
| Ohmic value | 20 Ω | 15 Ω | 25 Ω | 22 Ω |
- Check the heater assembly relays.
- Check and replace, if necessary, the main board.
F10: Upper door lock error
The F10 error indicates a problem with a door locking failure has been detected.
Causes:
- Faulty harness connection
- Faulty microswitches
- Faulty door motor
- Faulty door relay
- Faulty main board
Solutions:
- Check the harness on the main PCB.
- Check the microswitch contact.
- Check the door lock micromotor resistance:
| Electric part name | Ohmic value |
|---|---|
| Lock micromotor | 2600 Ω |
- Check the relay.
- Check and replace, if necessary, the main board.
F11: Communication error
The F11 error indicates that the communication between the oven and the LCD or cooktop is blocked.
Causes:
- Faulty harness
- Faulty LCD board
- Faulty cook top board
- Faulty main board
Solutions:
- Check the harness on the main board.
- Check and replace, if necessary, the LCD board.
- Check and replace, if necessary, the cooktop board.
- Check and replace, if necessary, the main board.
F16: Lower oven too hot error
The F16 error indicates a problem with the lower part of the oven being over 343°C for two minutes during cooking.
Causes:
- Faulty thermistor
- Stuck relay
- Faulty main board
Solutions:
- Check the thermistor.
- Check the relay.
- Check and replace, if necessary, the main board.
F17: Lower oven convection fan error
The F17 error indicates a problem with the convection fan has been detected.
Causes:
- Faulty wire harness
- Faulty fan motor
- Faulty fan relay
- Faulty main board
Solutions:
- Check the harness on the main board.
- Check the fan.
- Check the relay.
- Check and replace, if necessary, the main board.
F18: Lower oven meat probe shorted error
The F18 error appears when a short circuit in the lower meat probe is detected.
Causes:
- Faulty wire harness
- Faulty lower meat sensor
- Faulty main board
Solutions:
- Check the lower meat sensor wire harness connection to the board.
- Check the sensor resistance using a multimeter.
| Electric part name | Temperature | Ohmic value |
|---|---|---|
| Lower oven meat probe | 25˚C/77°F | 1.09 kΩ |
- Check and replace, if necessary, the main board.
F19: Lower oven, no heating error
The F19 error indicates a problem with the upper part of the oven not heating up by 5°C or more from its initial temperature within 5 minutes after cooking starts.
Causes:
- Faulty harness connection
- Faulty thermistor
- Faulty relay
- Faulty main board
Solutions:
- Check the harness on the main board.
- Check the thermistor.
| Electric part name | Temperature | Ohmic value |
|---|---|---|
| Lower oven meat probe | 25˚C/77°F | 1.09 kΩ |
- Check the relay.
- Check and replace, if necessary, the main board.
F20: Lower oven door lock error
The F20 error indicates a problem with a door locking failure has been detected.
Causes:
- Faulty harness
- Faulty microswitches
- Faulty lower door motor
- Faulty relay
- Faulty main board
Solutions:
- Check the harness on the main board.
- Check the microswitch.
- Check the door lock assembly.
- Check the relay.
- Check the main board.
F21: Right steam sensor open error
The F21 error appears when an open circuit in the right steam thermistor is detected.
Related error codes:
- F22: Right steam sensor short error appears when a short circuit of the right steam thermistor is detected.
- F24: A left steam sensor open error appears when an open circuit of the left steam thermistor is detected.
- F25: A left steam sensor short error appears when a short circuit of the left steam thermistor is detected.
Causes:
- Faulty wire harness
- Faulty XX thermistor sensor
- Faulty main board
Solutions:
- Check the XX sensor wire harness connection to the board.
- Check the sensor resistance using a multimeter.
| Electric part name | Temperature | Ohmic value |
|---|---|---|
| XX sensor | 25˚C/77°F | 1.09 kΩ |
- Check and replace, if necessary, the main board.
F33: Front induction Hob sensor error
The F33 error appears when an open circuit of the induction hob thermistor is detected.
Related error code:
F34: Rear induction hob sensor error appears when an open or short circuit of the induction hob thermistor is detected.
Causes:
- Faulty wire harness
- Faulty XX thermistor sensor
- Faulty main board
Solutions:
- Check the XX sensor wire harness connection to the board.
- Check the sensor resistance using a multimeter.
| Electric part name | Temperature | Ohmic value |
|---|---|---|
| XX sensor | 25˚C/77°F | 1.09 kΩ |
- Check and replace, if necessary, the main board.
F36: Top IGBT sensor error
The F36 error indicates a problem with an open or short circuit of the IGBT thermistor is detected.
Causes:
- Faulty sensor wire harness connector
- Faulty IGBT thermistor
- Faulty inverter board
- Faulty main board
Solutions:
- Examine the sensor harness connected to the main board.
- Check the IGBT thermistor.
- Check and replace, if necessary, the inverter and/or main board.
F38: Induction hob communication error
The F38 error indicates that the communication between the induction hob and the cooktop is blocked.
Causes:
- Faulty wire harness connector
- Faulty main board
Solutions:
- Check the harness on the main board.
- Check and replace, if necessary, the main board.
F42: Induction hob over voltage error
The F42 error is displayed when an overvoltage on the DC-link of the inverter PCB is detected.
Causes:
- Faulty Induction Hob inverter board
- Faulty main board
Solutions:
- Check the harness on the main board.
- Check the induction hob.
- Check the main board.
F45: Box fan error
The F45 error indicates a problem with the box fan has been detected.
Causes:
- Faulty harness
- Faulty Cook top board
- Faulty box fan
- Faulty main board
Solutions:
- Check the harness on the main board.
- Check the cooktop board.
- Check the box, fan.
- Check the main board.
F51: Griddle sensor open error
The F51 error appears when an open circuit in the griddle thermistor is detected.
Related error codes:
- F52: A griddle sensor short error appears when a short circuit of the griddle thermistor is detected.
Causes:
- Faulty wire harness
- Faulty griddle thermistor sensor
- Faulty main board
Solutions:
- Check the griddle sensor wire harness connection to the board.
- Check the sensor resistance using a multimeter.
- Check and replace, if necessary, the main board.
F56: Griddle plate hot error
The F56 error indicates a problem with overheating the griddle plate. A temperature over 345°C was measured for two minutes during cooking.
Solutions:
- Check the harness on the main board.
- Check the thermistor.
- Check the relay.
- Check the main board and replace it if necessary.
F59: Griddle cold error
The F59 error indicates a problem with the griddle part not heating up by 15°C from its initial temperature within five minutes after cooking starts or not reaching 38°C within five minutes.
Solutions:
- Check the harness on the main board.
- Check the igniter.
- Check the thermistor.
- Check and replace, if necessary, the main board.
F62: Sous-vide sensor short error
The F62 error appears when a short circuit of the sous-vide thermistor is detected.
Related error code:
- F69: The Sous-vide cold error indicates a problem with the Sous-vide part not heating up.
Causes:
- Faulty wire harness
- Faulty sous-vide thermistor sensor
- Faulty main board
Solutions:
Unplug the appliance, and:
- Check the sous-vide sensor wire harness connection to the board.
- Check the sous-vide sensor resistance using a multimeter.
- Check and replace, if necessary, the main board.
Conclusion:
LG range oven error codes are a useful tool for diagnosing and fixing problems with your appliance.
I am a master Appliance Repair technician with over 35 years of experience in the field. I am passionate about helping people troubleshoot their appliances and fix common problems. My website, appliancemode.com, provides a wealth of information on troubleshooting common appliance issues and deciphering error codes. This website aims to empower people to tackle appliance repairs themselves and save money on service calls.
