LG Start Circuit / Relay Drive Failure

Clock and timer work, but oven will not start any cooking cycle (no heat, no relay click).

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

Defective start button on keypad, Control board not sending start signal, Child lock or Sabbath mode active, Faulty door switch

Safety first: Ensure the oven is cool and power is stable.

Check modes: Verify that control lock and Sabbath mode are disabled.
Door switch: Ensure the door is fully closed and the door switch is functioning. Replace if it does not signal closed.
Keypad test: Press the Start button firmly. If it does not beep or respond, the keypad may be faulty and require replacement.
Control board: If the keypad and door switch are good but the oven never attempts to energize relays, the control board may be defective.

Medium 3/5

Touchpad / Control Panel Assembly

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