Microwave-humming-but-not-heating, my ge profile spacemaker 2.0 started to hum a bit louder and now makes no heat. i followed the ge troubleshooting flow-chart and it points to the magnetron, but the resistance checks (continuity pin-to-pin, open pins-to-case & no sign of any arcing or cracks in magnets).. New well explained video here https://youtu.be/sgj0hvi6aj4 if your microwave works, has power and timer runs but there is no heating, the most common problem..., it turns on, the platter spins, but no heating of food. again, the humming is now gone when it is off and the door is closed. also, when the oven was working, if you set the "power level" to say 5 out of 10, you could hear when the oven's "heating unit" (for lack of a better term) would come on. it "cycles" on and off 50% of the time..
The microwave does not heat and makes buzzing noise. let us consider the situation when the microwave does not heat and produces buzzing noise. 1) high voltage transformer, if your microwave is making an unusual or loud humming noise, you may have a problem with the magnetron. this component is part of the high voltage circuit and provides the microwaves that generate the heat. if the magnetron is defective, it may cause a loud humming or buzzing noise. access to the magnetron will require removal of the cabinet..
A microwave that does not heat up may have a broken magnetron. this is the part that makes the heat to cook the food. if it is broken, it may blow a fuse in your microwave which could lead to other components failing., when you use a microwave oven on a setting lower than high, the humming sound may seem more noticeable. according to ge appliances, the humming sound occurs due to the magnetron tube turning on and off to achieve the lower power setting..
Microwave ovens generate high voltages (thousands of volts) and dangerous amounts of radio-frequency radiation. attempting to repair one is not for the amateur tinkerer. i advise recycling or trashing it and getting a new one (they don't cost much these days.) - ge microwave oven, free repair help for your microwave oven. your microwave is not heating, but you can hear a loud buzzng noise. same-day shipping and hassle-free returns on all appliance parts from partselect. partselect offers free microwave repair help.