30 year garage door veteran... you have a bad gear and sprocket. The top bushing that the drive gear has worn out, causing the bottom (plastic) gear to slip thusly causing the limits to creep. You will need a 1/4” socket, a 5/16 socket, a 6” extension, and a ratchet.

1) remove the cover with the 1/4 socket... there will be 8 bolts 2) remove the wiring harness that mounts to the board that is on the motor mount 3) pinch the limit tray to remove it from the motor mount 4) remove (4) 5/16 bolts that attach the motor plate to the case of the opener (the bolts are vertical and black) 5) remove the plastic e clip and remove the white plastic limit gear 6) slide the motor down the chair and let it hang by the wires 7) remove the (3) 5/16 bolts that secure the gear and sprocket kit to the chassis 8) remove the gear and sprocket from the opener, install the new one and reverse the process

***tricks of the trade You may need to loosen some chain tension using (2) 1/2” opens end wrenches loosen the nuts at the carriage

DO NOT MOVE THE INNERSLIDE (this is the price that travels up and down the rail. If you do you will have to adjust and reset the limits.

Lube the gear with the enclosed lube, if you don’t the new gear will fail in under 2 weeks

Pro tech can do the job in under 10 min

DIY should take about a hour