Zanussi
No Heating – High Voltage System Failure
Microwave runs but does not heat food; turntable and light work normally, no error code displayed.
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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, Failed high-voltage diode, Failed high-voltage capacitor, Open high-voltage transformer
How to Fix / Troubleshooting
Critical safety warning: The high-voltage section can be lethal. Only qualified persons should work beyond basic checks.
- Confirm symptom: Place a cup of water inside and run on full power for 1–2 minutes. If the water remains cold, heating is not occurring.
- Check power settings: Ensure the power level is set to 100% and that you are not in a defrost or low-power mode.
- Listen for abnormal sounds: A loud buzzing or humming can indicate a shorted high-voltage component.
- Professional diagnosis: A technician will test the magnetron, diode, capacitor, and transformer and replace the faulty part with Zanussi-approved components.
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Repair Difficulty
Professional Required
5/5
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