When your LG oven shows an error code, it can feel frustrating, especially if you’re unsure what it means or how to resolve it. LG oven error codes are designed to pinpoint specific problems within the appliance, such as sensor malfunctions or communication failures. This guide is a one-stop solution to all LG oven error codes, covering everything from temperature issues to sensor errors and door lock problems. Read on to understand what each error means and how to fix it.
LG Oven Error Codes
| Error Code | Meaning | Cause | Possible Fix |
|---|---|---|---|
| F1 | Oven sensor (thermistor) open during cooking for over 1 minute | Faulty sensor | Check and replace the sensor |
| F2 | Oven sensor (thermistor) short for over 1 minute during cooking | Shorted sensor | Replace the oven sensor |
| F3 | Key shorted error | Keypad malfunction | Replace the control panel or keypad |
| F6 | Oven temperature exceeds 650°F continuously for 2 minutes during cooking | Temperature control failure | Check temperature sensor and control board |
| F9 | No heating detected during preheat | Heating element or sensor issue | Inspect and replace heating elements or sensors |
| F8 | Right oven probe sensor short | Probe sensor shorted | Replace the probe sensor |
| F10 | Door lock failure | Door lock mechanism malfunction | Check and replace door lock motor |
| F11 | Communication error between cooktop PCB and oven PCB | Communication failure between control boards | Inspect wiring and control boards |
| CF1 | LF Top sensor open or short | Sensor failure | Replace left front sensor |
| CF2 | LR Top sensor open or short | Sensor failure | Replace left rear sensor |
| CF3 | RF Top sensor open or short | Sensor failure | Replace right front sensor |
| CF4 | RR Top sensor open or short | Sensor failure | Replace right rear sensor |
| CF5 | Left IGBT sensor open or short | IGBT sensor issue | Replace left IGBT sensor |
| CF6 | Right IGBT sensor open or short | IGBT sensor issue | Replace right IGBT sensor |
| CF7 | Left communication error | Control board communication error | Check wiring and control boards |
| CF8 | Right communication error | Control board communication error | Check wiring and control boards |
| CFA | Over current detected | Power surge or short circuit | Inspect wiring and electrical components |
| CFC | Over voltage occurs | Power surge or incorrect voltage | Inspect power source and voltage regulators |
| CFF | Box fan not working properly | Fan motor malfunction | Replace the fan motor |
| F7 | Convection fan operating can’t be detected over 1 minute | Convection fan failure | Inspect and replace convection fan |
| F27 | Cooling fan stalled during self-clean | Fan malfunction or obstruction | Check for blockages or replace cooling fan |
| F1F4 | Oven thermistor open | Faulty oven thermistor | Replace oven thermistor |
| F2F5 | Oven thermistor shorted | Short circuit in thermistor | Replace oven thermistor |
| F6F16 | Oven temperature exceeds 650°F during cooking | Temperature sensor malfunction | Check temperature sensor and control board |
| F18 | Lower oven probe is shorted | Probe malfunction | Replace oven probe |
| F9F19 | No heating in oven | Heating element failure | Check heating elements and replace as necessary |
| F10F20 | Door lock failure during operation | Door lock mechanism malfunction | Check door lock motor and wiring |
| F4 | Oven thermistor open for over 60 seconds during cooking | Thermistor malfunction | Replace thermistor |
| F5 | Oven thermistor short for over 60 seconds during cooking | Shorted thermistor | Replace thermistor |
| F16 | Oven temperature exceeds 650°F during cooking | Temperature control malfunction | Inspect and replace temperature sensor |
| F19 | Oven does not heat during cooking | Heating element or sensor failure | Inspect heating elements and replace if necessary |
| F20 | Door lock failure while operating lock motor | Lock motor malfunction | Check and replace lock motor |
| F24 | Steam sensor remains open after steam heater operation | Steam sensor malfunction | Inspect and replace steam sensor |
| F25 | Steam sensor short for over 60 seconds after operation | Steam sensor shorted | Replace steam sensor |
Common LG Oven Error Codes
Oven Sensor Errors
F1
- Meaning: Oven sensor (thermistor) remains open for over 1 minute during cooking.
- Cause: The sensor may have become disconnected or is defective.
- Fix: Check the sensor wiring and replace the sensor if needed.
F2
- Meaning: Oven sensor (thermistor) is shorted for over 1 minute during cooking.
- Cause: The sensor or its wiring may have short-circuited.
- Fix: Replace the faulty thermistor.
F4
- Meaning: Oven thermistor remains open for more than 60 seconds after cooking starts.
- Cause: Disconnection or failure of the thermistor.
- Fix: Inspect the wiring and replace the thermistor if necessary.
F5
- Meaning: Oven thermistor is shorted for more than 60 seconds after cooking begins.
- Cause: Short circuit in the sensor or wiring.
- Fix: Replace the shorted thermistor.
F1F4
- Meaning: Oven thermistor is open.
- Cause: The sensor may be disconnected or faulty.
- Fix: Check the sensor wiring and replace it if necessary.
F2F5
- Meaning: Oven thermistor is shorted.
- Cause: The sensor or its wiring has shorted.
- Fix: Replace the shorted thermistor.
Temperature and Heating Issues
F6
- Meaning: The oven temperature is continuously over 650°F for more than 2 minutes during cooking, except in self-cleaning mode.
- Cause: Overheating due to a malfunctioning thermostat or sensor.
- Fix: Check the temperature sensor and thermostat and replace them if needed.
F9
- Meaning: No heating detected; oven temperature does not exceed 150°F within 5 minutes of preheating.
- Cause: Malfunctioning heating elements or a defective sensor.
- Fix: Inspect and replace the heating elements or sensor if necessary.
F16
- Meaning: Oven temperature exceeds 650°F for more than 2 minutes during cooking (except self-cleaning).
- Cause: Overheating due to a sensor or thermostat issue.
- Fix: Replace the temperature sensor or thermostat if faulty.
F19
- Meaning: The oven fails to heat up by more than 10°F within 5 minutes during preheating, while the door is closed.
- Cause: Possible heating element or sensor failure.
- Fix: Replace the faulty heating element or sensor.
Sensor and Probe Issues
F8
- Meaning: Right oven probe sensor is shorted.
- Cause: The probe wiring may have shorted, or the sensor itself is defective.
- Fix: Replace the right oven probe sensor.
F18
- Meaning: The lower oven probe sensor is shorted.
- Cause: The sensor wiring is short-circuited or the probe sensor is faulty.
- Fix: Replace the lower oven probe sensor.
F24
- Meaning: Steam sensor remains open for 10 seconds after the steam heater has been operating for 5 minutes.
- Cause: The steam thermistor may be disconnected or malfunctioning.
- Fix: Check the steam sensor and replace it if necessary.
F25
- Meaning: Steam sensor is shorted for over 60 seconds after the steam heater has been operating.
- Cause: The steam sensor may be short-circuited.
- Fix: Replace the shorted steam thermistor.
Communication Errors
F11
- Meaning: Communication error between the cooktop PCB and oven PCB lasting more than 10 seconds during self-cleaning mode.
- Cause: Wiring or connection issues between the PCB modules.
- Fix: Check the wiring between the PCBs and replace any faulty components.
CF1, CF2, CF3, CF4
- Meaning: Communication errors for Left Front (CF1), Left Rear (CF2), Right Front (CF3), and Right Rear (CF4) top sensors respectively.
- Cause: Connection failure between the sensors and control board.
- Fix: Check the wiring connections and replace any affected sensor if needed.
CF5, CF6
- Meaning: Communication errors at Left (CF5) and Right (CF6) IGBT sensors.
- Cause: Connection issues between the IGBT sensors and control board.
- Fix: Inspect and replace the IGBT sensors if necessary.
CF7, CF8
- Meaning: Communication errors at the right module.
- Cause: Communication failure between the right module and control board.
- Fix: Check the connections and replace the module or board if required.
Fan and Door Lock Errors
F7
- Meaning: Convection fan operation error; the fan cannot be detected for over 1 minute.
- Cause: The convection fan may be blocked or malfunctioning.
- Fix: Check the fan motor and replace it if necessary.
F27
- Meaning: Cooling fan has stalled during self-cleaning mode.
- Cause: Blocked or malfunctioning cooling fan.
- Fix: Inspect the fan and replace it if needed.
F10
- Meaning: Door lock failure during operation of the lock motor.
- Cause: The door lock motor may be defective.
- Fix: Replace the door lock motor if faulty.
F10F20
- Meaning: Door lock failure during the operation of the lock motor in self-cleaning mode.
- Cause: The door lock motor or wiring may be defective.
- Fix: Inspect and replace the door lock motor.
Voltage and Power Issues
CFA
- Meaning: Over-current detected in the cooktop.
- Cause: Excessive current flow through cooktop components.
- Fix: Inspect the wiring and replace any faulty components.
CFC
- Meaning: Over-voltage detected in the cooktop.
- Cause: Voltage surge or electrical supply issue.
- Fix: Consult an electrician to check your electrical supply.
CFF
- Meaning: Box fan malfunction.
- Cause: The box fan may not be functioning properly.
- Fix: Replace the box fan motor.
Conclusion
Dealing with LG oven error codes doesn’t have to be overwhelming. By understanding what each error code means and how to troubleshoot it, you can quickly identify and fix issues with your oven. Whether it’s a sensor malfunction, temperature issue, or a communication failure, this comprehensive guide is your one-stop resource for resolving all LG oven error codes.