Breville No Power – Main Fuse or Power Supply Failure

Microwave does not start at all; display is blank and unit appears completely dead.

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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

Blown internal line fuse, Faulty power cord, Failed noise filter / line filter board, Defective main control board

How to Fix / Troubleshooting

Safety: Unplug the microwave before moving or inspecting it. Internal fuses are not user-serviceable due to high-voltage risks.

User-level checks:

  • 1. Verify outlet: Plug another appliance into the same outlet to confirm it has power.
  • 2. Check circuit breaker: Inspect your home's breaker panel for a tripped breaker or blown fuse and reset/replace as needed.
  • 3. Inspect power cord: Look for visible damage, cuts, or burn marks on the Breville power cord. If damaged, do not use the microwave.
  • 4. Try another outlet: Plug the microwave directly into a different, properly grounded wall outlet (no extension cords).

If the unit remains completely dead, an internal fuse or control board may have failed. Do not attempt to open the cabinet or replace fuses yourself; contact a qualified technician.

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Repair Difficulty

Hard 4/5

Required Part

Internal Line Fuse
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