Avanti Start Circuit / Control Logic Failure

Microwave display and clock work, but pressing START does nothing; no relay click, no fan or light.

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

Faulty START key on keypad, Child lock enabled, Failed control board start relay, Door not detected as closed

Safety: Unplug the microwave before removing the control panel.

Steps:

1. Verify door closure: Ensure the door is fully closed and latched. Try opening and closing firmly.
2. Check for LOC/lock icon: Disable child lock if active.
3. Test other keys: If other keys respond but START does not, the keypad membrane may be failing. Replace the keypad.
4. Control board: If the START key is good but no relay click is heard, the control board’s start relay or logic may be defective and require replacement.

Medium 3/5

Control Panel Assembly

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