Wolf
No Heat – Magnetron / High-Voltage Failure
Microwave runs (light and fan on, turntable rotating) but food does not heat.
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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 magnetron, Defective high-voltage transformer or inverter, Failed high-voltage diode, Open thermal cutoff in high-voltage circuit
How to Fix / Troubleshooting
Safety first: Unplug the microwave immediately. High-voltage components inside a Wolf microwave can store lethal charge even when unplugged.
User-level verification:
- Place a microwave-safe cup of water in the oven and run on full power for 1–2 minutes. If the water remains cold or only slightly warm, heating has failed.
- Confirm the unit is not in Demo mode (refer to your Wolf manual for model-specific instructions).
Do NOT attempt:
- Do not remove the cabinet or attempt to access the magnetron, transformer, capacitor, or diode.
Next steps:
- Contact an authorized Wolf service technician. They will test the magnetron, high-voltage transformer or inverter, diode, and thermal cutoffs and replace the defective component.
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Repair Difficulty
Professional Required
5/5
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