Hyundai Elantra makes a buzzing sound when you adjust the controls of ventilation?

Hyundai Motors, you ought to keep a radiant complexion: query Jamesway : Hyundai Elantra makes a buzzing sound when you adjust the controls of ventilation 2008 Hyundai Elantra, I bought this car and I noticed that when I purge to get rid of the button from the commence and adjust some other settings, it makes a loud humming. Looks like it is under the driver side dashboard. I was questioning if there was a element of motor control but it sounds also loud to be normal. And how all the work. I

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