Amana
Abnormal Noise – High-Voltage or Mechanical Component
Microwave runs with loud buzzing, humming, or grinding noise that is much louder than normal, with or without heating.
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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
Failing magnetron, Shorted high-voltage diode, Noisy high-voltage transformer, Worn turntable motor or support rollers
How to Fix / Troubleshooting
Safety First: Unplug the microwave. Loud buzzing from the high-voltage section can indicate dangerous faults.
- Isolate noise source: Run the microwave briefly with a cup of water and listen carefully (from a safe distance) to determine if the noise is from the bottom (turntable), side (transformer), or top (magnetron/fan).
- Check turntable system: Remove the glass tray and roller ring. Run briefly to see if the noise disappears. If so, clean and inspect the roller ring and tray support.
- High-voltage noise: If the noise is a deep, loud buzz and heating is poor or absent, the magnetron, diode, or transformer may be failing. Do not continue to run the unit.
- Professional repair: Have a technician inspect and replace the noisy component. High-voltage parts must be handled with extreme caution.
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Repair Difficulty
Professional Required
5/5
Required Part
Magnetron or High-Voltage Transformer
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