I have a problem with the vertical movement. I pulled the seat and tested for power to the motor, it appears there is power when I use the switch and I took the motor off and it continues to work in one direction, one motor did work intermittently in the other direction which is probably what happened to yours when you hit it. I think it will be easy enough to find them at the local junk yard, but I have not made it there yet. They are $100 each online so it is not that important to me.