Model Number: MMV4205FW1
Brand: Maytag
Age: 1-5 years

My Maytag over the stove microwave/range hood comes on but does not heat. It is making a louder than normal buzzing sound. I replaced the diode and tested the capacitor and think both are good. I did a ohm measurement and continuity test (it beeped) on the magnetron and think it is good. I'm not sure about the transformer. On the low voltage side the continuity tester gives me a "beep" between any combination of the three input terminals. The thermal fuse on the magnetron housing is good. Please help. Thanks.