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Hi! Thanks for asking. A humming noise when the microwave is not in operation would be normal. The transformer emits a slight humming sound that is usually not noticed. The transformer is used to power the clock. If you'd like to read about other normal operating characteristics, you can see an article on our website titled NORMAL OPERATIONAL CHARACTERISTICS FOR A MICROWAVE. Hope this is helpful! All the best. -Michael@GEA
Sorry, there was a problem. Please try again later.Yes I noticed when you pointed out I do not know if it is normal or not I have a question My old ge Microwave unit had a light that you could see food cooking this one does not it only lights when you open the unit
Sorry, there was a problem. Please try again later.I don't hear any hum on my oven, but my hearing is not the greatest. I would suggest sending a text or e-mail to GE tech support for a more definitive answer.
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