- Model Number
- 6-10 years
When I turn the microwave on it makes a loud humming noise and does not heat, almost seems like it's not getting enough power. I tested the diode and it's fine. Also tested the magnetron (looks new) per many online videos and it appears to be fine based on resistance testing but also read that the test is not definitive. Also checked the capacitor per online instructions via ohm testing and it tests fine, and also looks new. The high voltage transformer checked ok with the exception of the high voltage side, which read 120 ohms…I read it shouldn't be over 90. Finally, I disconnected the capacitor and magnetron and turned the microwave on and still get the loud humming sound. I'm thinking the issue is the high voltage transformer but also saw a video which showed a microwave making the same noise as mine and it was the magnetron. What do you think?