GE Advantium 120 Convection/Microwave Oven "heating unit fan coming going" Questions

...unit it to protect the control unit. So I assume this was happening when the fan came on? I hope this answers your question. When this happens the unit will turn off when it cools down all by

fan and turntable does not turn. is it a fuse? Key clue is table does not move---All microwaves with a table have a lever switch that is engaged when door closes--only can get at from inside the unit-

fan is not working and heat builds up, it is going to open a thermostat. On some makes, this thermostat might re-set itself as soon as the temperature cools down. Other makes, you will have to replace

...off and on. Fan came on and wouldnt go off. Unplugged unit and now vent wont come on display shows izw and microwave won't heat may be short circuit at high voltage section replace diode or ...

...unit is over heating and has a bad cooling fan,Magnetron or Magnetron thermostat. Two microwaves, 3 service companies and 6 service calls later, I think I have the answer. The units are ship from the ...

...fan comes on when you put the unit into a cook cycle and all sounds normal otherwise, you most likely have a bad magnetron tube. (Google "GE magnetron failure" and watch how many complaints and ...

...heating but lights and fan work Whirlpool says to change magnetron Opened unit to check fuse. 20 Amp fuse checks good Magnetron has 90 Ohms across, infinite to gnd transformer primary 0.4 ohms, ...

...fan and turntable come on. Second, in trying to simply use the MW function - when the door is closed and MW ''starts'', nothing happens except that the timer counts down. No light comes on, no ...

...but no heat. Mine having same prob but now fan not coming on either possible primary switch, very common for these units. or a bad mag tube. ill go with the switch contacts first and work from ...

...unit was brand new, but had been installed in a home previously, just never used. When we finally got it up neither the under fan came on nor did it heat up for more than a couple minutes or so. Then ...