Wolf
No Power – Line Fuse or Power Input Failure
Microwave does not power on at all; display is blank and no lights or sounds occur.
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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 line filter board, Open thermal cutoff on cavity or magnetron
How to Fix / Troubleshooting
Safety first: Turn off the circuit breaker and unplug the unit if accessible.
Basic checks:
- Verify the outlet has power by plugging in another appliance.
- Check the home circuit breaker or fuse for the microwave circuit and reset/replace if tripped or blown.
- Ensure the power cord is fully inserted into the outlet and not damaged.
If the outlet and breaker are good and the unit remains dead:
- The internal line fuse or thermal cutoff may have opened due to a fault.
- These components are inside the cabinet near high-voltage wiring and must be tested and replaced by a qualified technician.
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Repair Difficulty
Hard
4/5
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