When talking about "Power Level", there is a misconception that the cooking power is being adjusted. This is not the case. The user is actually adjusting the duty cycle of the Magnetron. For instance at 30%, the Magnetron will be turned on for 20 sec. and off for 40 sec. A loud 60 cycle hum is usually caused by a shorted Magnetron. Thus the unit is not economically repairable.
SOURCE: Magic Chef 1.0 cu. ft. Convection Microwave Oven
There are several things that could cause a microwave not to heat. Most common is the magnatron and some models have up to a 5 yr warranty on that part. Check the owners manual for that info.
SOURCE: Microwave won't heat/Makes buzzing noise.
The symptoms you are describing are typical of a magnetron that has gone bad. Continuing to attempt to use the oven in its current condition can cause further damage. So, I would recommend not using it. Microwave ovens are considered dangerous and repairs should not be attempted by anyone that is not electronic saavy. The High Voltage Network inside the oven has voltage potentials of 14,000 volts and higher. If you feel this is something you wish to attempt, the Magnetron part number is 1156751 and costs approx. $158. Keep in mind, if the magnetron has been arcing and making a burning smell you may have burned the protective coating that lines the walls of the waveguide. If the waveguide is damaged it is not repairable. I do not know if this is a replaceable item on your model microwave. Double check your warranty information and/or owner's manual. In many cases the magnetron is warranted for several years beyond the limited warranty that comes with most appliances. Post back with comments and let me know if you want me to assist you further. In addition, if you provide me with your EXACT model number (located along the door opening) I can narrow down parts a little better. I know this all sounds discouraging, but I do hope I have been able to help you.
SOURCE: GE JVM1650 Microwave Making Loud Noise
hello Frank. Sorry to tell you that the magnetron is going bad and making that terrible noise. Since the inside of a microwave, even unplugged has up to 2000 residual and deadly volts of electricity I recommend either calling a pro or replacing the unit.
SOURCE: no power. outlets is fine. please help. thanx
This will occur if the inverter has experienced a surge or, if the cut off fuse has blown. you can check the cut-off fuse by removing the cover. it is located near the magnetron tube. replace it if it is blown. if the fuse is ok, this will confirm inverter failure. replace the inverter in this case.
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