Teka High Voltage Transformer or Magnetron Noise

Microwave makes loud buzzing or humming noise during operation, louder than usual, sometimes with reduced heating.

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.

Possible Causes

Failing high-voltage transformer,Loose transformer mounting bolts,Magnetron internal arcing,High-voltage component vibration

Safety: Unplug the unit before any internal inspection.

User checks:

Verify that the noise occurs only when heating (not in standby).
Remove the glass tray and roller ring, then run briefly to see if the noise is from the turntable area.

Internal checks (technician):

Inspect the high-voltage transformer mounting; tighten loose screws.
Check for burn marks or smell near the transformer and magnetron.
If noise is accompanied by poor heating, suspect magnetron or transformer failure and replace as needed.

Hard 4/5

High-Voltage Transformer

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