If the motor hums but the chain doesn t move that indicates a problem with the motor.
Grinding noise chain not moving on garage door.
The main drive gear is the plastic gear that comes in direct contact with the worm drive gear on the motor.
If the chain was installed too tightly on the garage door opener it can make opening the door more difficult for the automatic opener.
The main drive gear is the most common component to fail on most openers the gear alone should cost you less than 20.
This excess tension causes the gear that moves the chain to grind down.
The door track rollers move each time you open or close the door leading to a lot of movement and causing wear.
If the garage door opener makes a grinding noise but the door doesn t move your main drive gear is probably toast.
Press the remote or the wall mounted start switch listen to the motor and watch the movement of the chain.
If you hear a garage door grinding noise it could be the rollers.
If the gear becomes too worn it will no longer be able to move the chain.