The display shows F18, and an audible alarm sounds continuously when the oven is powered.

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 alarm output on the control board, Shorted buzzer component, Corrupted timer state, Liquid ingress causing a short on the PCB

Safety: Disconnect power before accessing the control panel.

Attempt reset: Use the timer controls to cancel any active alarms. Set the timer to zero and clear all programs.
Power cycle: Turn off power for 5–10 minutes and restore. If the alarm sounds immediately upon power restoration with F18 displayed, the fault is likely on the PCB.
Inspect for moisture: Remove the control panel and check for signs of water or steam damage. Allow it to dry fully if moisture is present.
Board replacement: If the buzzer remains on and F18 persists, the control board will need to be replaced.

Medium 3/5

Electronic Oven Control Board

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