The door track rollers move each time you open or close the door leading to a lot of movement and causing wear.
Garage door buzzing sound.
Squeaky garage door or garage door grinding sound when opening or closing.
It can also be caused by attempting to use the garage door opener with a broken torsion spring.
This can be a common problem in garage door openers utlizing dc motors such as the overhead door phantom 777cd or even the newer model overhead door legacy 850 2029.
Unfortunately this is just something that happens with usage over time.
The gears are spinning but nothing else is happening.
If you hear a garage door grinding noise it could be the rollers.
This wear could damage the roller surface causing them not to roll correctly.
Because it hums when you try to open it the battery is working properly.
Worn gears inside the garage door opener s motor unit can make grinding or buzzing noises.
Replace the gear and sprocket assembly or the drive and worm gears when they re worn and making noises.
That is the buzzing sound that the customer hears.