Amica
No Heating – High-Voltage System Failure
Microwave runs but does not heat food; 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, Defective high-voltage diode, Failed high-voltage capacitor, Faulty high-voltage transformer or inverter module
How to Fix / Troubleshooting
Critical safety warning: The high-voltage section can be lethal. If you are not trained in microwave repair, do not attempt to service the high-voltage components.
- Confirm symptom: Place a cup of water inside and run the microwave for 1–2 minutes. If the water remains cold and the turntable and light operate, heating is not occurring.
- Basic inspection only: Unplug the Amica microwave and remove the cover. Visually inspect for burnt smells, charred components, or a blown line fuse. Do not touch the high-voltage capacitor or magnetron terminals.
- Door and timer check: Verify that the door closes properly and that the timer is actually counting down; a control issue can sometimes mimic no-heat.
- Professional repair: Diagnosis of magnetron, diode, capacitor, transformer, or inverter requires specialized tools and discharge procedures. Contact an authorized Amica service technician.
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Repair Difficulty
Professional Required
5/5
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