Hi, have you lubed the pivots on you step. The step, in out '87, got cranky and I found it had never been lubed. They should be lubed about every 30 days [factory] if your using it a lot. It'll make a lot of difference. Before you try pulling out the step i would suggest you disconnect the power, and the link. That's a powerful motor and it could hurt or injure you. We also had a fussy door switch which I finally had to replace as well.........Good luck, Jerry
~~~~~~~~~~~~~~~~~~~~~~~~~~Sea ya!~~~~~~~~~~~~~~~~~~~