It could be that your motor no longer works, or has become disconnected. (Sometimes the shafts on the motor breaks off).
It's also possible that the relay controlling it may not be working properly.
The motors are simple and easy to change.
If it's a relay problem, then that would mean a new relay pcb. In which case if it is a domestic unit, it would be cheaper and easier for you to buy a new machine.
Jon, May 2007