F2
LG Studio
Oven Over-Temperature or Stuck Relay
Oven displays F2 and may beep continuously; oven may overheat or shut down during a bake cycle.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Failed oven temperature sensor (RTD), stuck bake relay on main PCB, poor airflow around oven, wiring short between sensor and control
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker. The oven may be very hot; allow it to cool completely.
- Check for obvious overheating: Open the door once cool and look for signs of burning or melted racks/liners. Remove any foil that may block vents.
- Inspect oven temperature sensor: Locate the thin metal rod (sensor) on the back wall inside the oven. From the rear of the unit (power OFF), access the sensor connector and ensure it is firmly connected and not damaged.
- Test sensor resistance (if you have a meter): At room temperature, the LG sensor should read around 1080 Ω at 77°F (25°C). If it is open, shorted, or far out of range, replace the sensor.
- Check wiring: Inspect the harness from the sensor to the main PCB for pinched or burned wires.
- If sensor and wiring are good: The bake relay on the main PCB may be stuck closed, causing overheating. In this case, the main PCB should be replaced.
Warning: Overheating can be a fire hazard. Do not continue using the oven until the cause is corrected.
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Repair Difficulty
Hard
4/5
Required Part
Oven Temperature Sensor (RTD)
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