Sears/Craftsman Garage Door Opener
I have just replaced the chain drive gear and sprocket assembly (plastic gears were stripped)as per the instructions with the carriage and limits in the down position. When I plugged the unit in the motor want's to drive in the down rotation, I tried changing the limit switch to the up position but the motor only wants to rotate in the down rotation. I believe this may have been the problem that caused the gears to strip. Any ideas?? circuit board or ????