LG Cooling Fan Stuck On

Oven fan runs continuously even when the oven is off and cool.

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

Stuck fan relay on control board, Faulty temperature sensor near control, Control board logic fault

Safety first: Turn off power at the breaker before inspecting the control board.

Allow full cool-down: Some LG ovens keep the fan running until the cavity and control area are cool. Wait 30–60 minutes.
Power reset: Turn the breaker OFF for 5 minutes, then ON. If the fan immediately starts with a cold oven, suspect a stuck relay.
Inspect control board: Remove the rear panel and examine the board for a welded fan relay (burn marks). Replace the control board if the relay is stuck closed.

Hard 4/5

Main Oven Control Board (ERC/PCB)

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