Chamberlain buzzing noise
Hey folks, I have just purchased and installed a Chamberlain 1/2 HP screw type garage door opener, and everything works fine (lights, up/down motion, etc). The only strange thing I noticed is that the unit makes a buzzing sound (even when not in operation). I was wondering if this was normal. I took a ladder, and it sounds like the sound is coming from the back of the garage door opener unit. Does anyone have any experience with this?