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Microwave-making-noise-and-not-heating, a capacitor is an electrical device which stores electricity. 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., the magnetron is what produces the microwaves and two wires plug into its porcelain-looking terminal are. remove the wires (note which goes to which as it does make a difference) and run the microwave. if it is quiet then the mag is bad. ask your own appliance question.

Our whirlpool gold over-the-range microwave (10yrs old this month) has started making a terribly loud humming/buzzing noise whenever we try to cook with it. all controls, turntable, light and timer..., start right here find appliance parts, lawn & garden equipment parts, heating & cooling parts and more from the top brands in the industry here. click on shop parts, or select the kind of product you're working with on the left and we'll help you find the right part. shop parts.

If the microwave does not heat, the humming is likely caused by a malfunction of one of three parts: the power diode, high voltage capacitor, or magnetron. 1) power diode — this is an electronic component that readily passes current in one direction only and blocks the flow of current in the opposing direction., the microwave turns on and the turntable spins but its making the microwave turns on and the turntable spins but its making a loud noise like somethings sticking behind the control panel and it is not heating … read more


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