My xtender power assisted system developed a problem I've never had before. When I apply pressure to one hand rim only, as if trying to turn to the opposite side, the chair will take on a life of its own, and put me in a continual circular accelerating pattern. It is almost like being in an astronaut training centrifuge. Straight propulsion is fine. I only have this problem executing a turn. I have to be super careful with it, as it can get out of hand.

Sunrise medical said it may be something with the sensor(s) in the hand rims getting stuck.

Anybody have a similar problem in the past?