Zanussi Stuck Relay or Control Logic Fault

Microwave continues to run (fan and turntable) after the timer reaches zero and beeps.

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 power relay on control board, Firmware glitch, Shorted triac (if used), Keypad sending continuous command

Safety first: Unplug the microwave to stop operation.

Power reset: Leave unplugged for 10 minutes, then reconnect and test.
Observe keypad: Ensure no buttons are stuck physically.
Control board repair: If the issue recurs, the power relay or triac on the PCB may be stuck and the board should be repaired or replaced.

Hard 4/5

Main Control PCB

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