Why Is My Microwave Making A Loud Humming Noise?
If your microwave is making a loud humming noise, it could be due to a faulty magnetron. The magnetron generates the microwaves that heat food in the microwave, and when it starts to malfunction, it can produce a loud, continuous buzzing or humming sound. Other possible causes include a defective high voltage diode or capacitor, which can also produce a humming or buzzing sound. It’s best to have a professional inspect and repair your microwave if you encounter any of these issues.