Smeg Microwave: Loud buzzing, no heat

Wed, 10 May 2017 06:24:23 -0700

Microwave runs but doesn't heat, with a louder than normal buzz from the transformer.

I've replaced the diode, the capacitor reads correct value and the magnetron doesn't read any earth leakage.

With the mag disconnect the appliance sounds normal.

Would you say the mag filament is faulty, or transformer failing?

⟐ Answer accepted May 10, 2017 at 6:24 MST

iFixit - Answers With Device "SMEG Microwave"