The small green limit switch needs a complete throw, either left or right. Sometimes oil helps. Remove debris, can be a miserable experience. I believe Denis Zander is good at replacing switch motors, that don't work, properly. Other problem, the three small leads, Green, Red and Yellow, break/become disconnected from the top of picture PC board. The board, in most cases, has to be removed, to solder the wires, in place.
