Café
No Heat – Magnetron / High-Voltage Failure
Microwave runs but does not heat food; turntable and interior light operate 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 transformer or inverter, Blown high-voltage fuse, Shorted high-voltage diode
How to Fix / Troubleshooting
Critical safety warning: The high-voltage system in a Café microwave is dangerous. Do not remove the outer cover or attempt internal repairs yourself.
User-level checks:
- Test with water: Place a microwave-safe cup of water inside and run on HIGH for 1–2 minutes. If the water remains cold, the unit is not heating.
- Check power level settings: Ensure the power level is set to 10 (HIGH) and not a low setting.
- Listen for humming: If you hear the usual fan and turntable but no deeper humming sound, the magnetron or high-voltage supply may not be energizing.
- Service required: Contact an authorized Café technician to test the magnetron, transformer/inverter, diode, and internal fuses, and replace the failed component.
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Repair Difficulty
Professional Required
5/5
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