LG range shows F31 and oven may shut down or not start.

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.

Possible Causes

Cooling fan tachometer failure (if equipped), Blocked airflow causing fan overload, Faulty fan motor, Control board fan monitoring circuit failure

Safety first: Disconnect power at the breaker.

Clean vents: Ensure rear and top vents are not blocked by cabinets, foil, or debris. Restricted airflow can cause fan errors.
Inspect fan: Access the cooling fan and clean dust or grease from the blades. Verify it spins freely.
Replace fan if noisy or stiff: If the fan is noisy, wobbly, or stiff to turn, replace the cooling fan assembly.
Control board: If the fan runs normally but F31 persists, the control board's fan monitoring circuit may be defective and require replacement.

Medium 3/5

Oven Cooling Fan Motor Assembly

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