This is an oil-filled high-voltage capacitor used in the microwave's magnetron circuit. It stores and releases electrical energy to help power the magnetron, which generates the microwaves that heat food. Replace this capacitor if the microwave runs but does not heat, hums loudly without heating, or if the capacitor has visibly bulged or leaked oil.
Do-It-Yourself Stories from Customers like You
Samsung MC1055BB micro blows fuse when press start David D. • San Diego , CA • November 11, 2018
Downloaded service manual, got over my fear of getting shocked. Found Samsung put bleed resistors in capacitor, jumped with screwdriver to confirm as per service manual. Tested diode, found a large voltage drop with 9v battery. Capacitor test failed. Called into APP to confirm, got some great advice. Ordered cap and diode, arrived next day, installed and corrected problem. This micro has conv and is built into my motorhome, I had few options, none really, but to fix and no one wanted to...
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