Breville
Relay or Output Drive Failure
Microwave buttons beep but nothing happens; display shows time but no cooking starts and no error code appears.
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Safety Warning
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.
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Possible Causes
Failed main relay on control board, Faulty door interlock logic, Defective control PCB output stage, Internal wiring fault to high-voltage section
How to Fix / Troubleshooting
Safety: Unplug the microwave before moving or cleaning it.
User-level steps:
- 1. Confirm programming: Ensure you have entered a valid time and pressed START.
- 2. Check door: Open and close the door firmly, then try again.
- 3. Listen for relay click: When pressing START, listen for a click from inside. No click suggests a relay or control issue.
- 4. Power reset: Unplug for 10 minutes, then plug back in and test.
If the microwave still will not energize the fan or turntable, the main control board or internal wiring likely needs professional diagnosis and repair.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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