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Microwave-making-noise-not-heating, a defective capacitor may be why your microwave is not heating but you are hearing a buzzing or humming noise. the capacitor will have to be tested to determine if this is the cause of your problem. a defective capacitor will have to be replaced before your microwave will work again.. 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., if your microwave is making noise, use our troubleshooting guide to check the magnetron, cooling fan, and high voltage diode. learn to repair a noisy microwave..

View this repair: visit us at http://..., is your microwave noisy? a microwave making unusual noises is a common problem for many people. having a noisy microwave can be very frustrating. find out what the 6 main causes are for a noisy microwave oven and discover some simple solutions to fix the problem..

The magnetron makes the heat, so disconnected it cannot. leave the wires off the mag. disconnect the other wire from the transformer that goes to the capacitor and run the unit again-if quiet then you have either a bad diode or capacitor here then so you would replace both of them., 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)..

Ok that's what i figured. if the microwave still looks like it's working, but it's buzzing loudly it's just not heating--that means your magnetron or transformer that powers the magnetron has likely failed. the magnetron is the part that actually creates the microwave to heat the food and it commonly goes bad and rarely gives a warning., 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..

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

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