Chamberlain 5100 Garage Door Opener Problem
I have a Chamberlain 5100 garage door. It recently stopped working. I removed the housing and it was pretty clear that the drive gear was worn and needed to be replaced. I have since replaced the gear and hooked everything back up. However, as soon as i plug the unit in, the motor starts running and does not stop. It doesn't respond to any of the remotes or wall switches. I've tested it, and since i replaced the gear, the unit will open the door but doesn't stop until it is forced to and then the unit continues to hum.
This problem did not exist prior to changing the gear. Any advice?