The main drive gear is the plastic gear that comes in direct contact with the worm drive gear on the motor.
Trouble shooting garage door opener problems.
Garage door opener won t open all the way fix.
Replace the main gear drive if the garage door opener makes a grinding noise but the door doesn t move your main drive gear is probably toast.
If everything else is working well then it could be that the power in.
The wall switch doesn t work first check your fuses gfci or breaker to see if any of them have tripped broken or burnt out.
If this is the case then replace the fuse or reset the breaker or gfci and try the wall switch again.
If your garage door opener works when the interior button is pushed but fails to work when the button on the remote is pushed then there are three common problems that arise.
It s also possible that the circuit breaker fuse or gfci outlet powering the door opener circuit has tripped or burned.
First of all make sure that your remote battery is working by replacing it.