Gorenje
Abnormal Noise from High-Voltage Transformer or Magnetron
Microwave runs but makes loud humming, buzzing, or growling noises, louder than usual.
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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 high-voltage transformer,Shorted high-voltage diode or capacitor,Loose mounting bolts on transformer or magnetron,Magnetron internal failure
How to Fix / Troubleshooting
Safety: High-voltage components are dangerous. Do not touch internal parts unless qualified.
- Stop operation: If the noise is very loud or accompanied by burning smell, stop using the microwave immediately and unplug it.
- Check load: Never run the microwave empty; always place a microwave-safe load (e.g., a cup of water) when testing.
- Internal inspection (qualified persons): Remove the cover and check that the transformer and magnetron mounting bolts are tight and that no metal parts are vibrating against the chassis.
- Component testing: A technician should test the HV diode, capacitor, and transformer for shorts/opens and replace any noisy or failing component.
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Repair Difficulty
Professional Required
5/5
Required Part
High-Voltage Transformer
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