Siemens No Power – Primary Power Circuit Failure

Microwave completely dead – no display, no light, no response when buttons are pressed.

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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 mains fuse, faulty power cord, defective line filter module, failed main control PCB power supply

How to Fix / Troubleshooting

Safety warning: Internal fuses and mains wiring are connected directly to line voltage. Only qualified personnel should open the cabinet.

User-level checks:

  • 1. Check outlet: Plug another appliance into the same outlet to confirm it has power.
  • 2. Inspect power cord: Look for cuts, kinks, or burn marks on the Siemens microwave power cord and plug.
  • 3. Reset breaker: Check your household circuit breaker or fuse for the microwave circuit and reset/replace if tripped.
  • 4. Try another outlet: If possible, plug the microwave into a different, known-good outlet (not via an extension cord).

If the microwave remains dead, an internal fuse or power supply component has likely failed and must be replaced by a technician.

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Repair Difficulty

Hard 4/5

Required Part

Internal Mains Fuse / Line Filter Module
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