My Kenmore microwave will do everything but the magnetron will not turn on! I can enter a time and hit start... the light will turn on, time count down, and bell ring, but the fan and magnetron will not start up.I have a Kenmore microwave Model number 721-65223. Everything works except the heat. I tried unplugging it and restarting and setting it. I also tried waiting several hours and trying it again. the light goes on, the turn table turns, the timer works great but there is no heat.
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