Then go to the house breaker box and try turning the house breaker to the oven off for 5 minutes. Electric ovens have two switches in the house breaker box. This will reset the system and clear any electronic glitches that are in the system. If this does not remedy the situation then this means you have a bad oven sensor.. An LG Oven displays a F3 error code when a Oven Temperature Sensor Error has been detected by the internal electronic diagnostics.
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