Bosch max plus 2860 washing machine wont spin?

The machine seems to go through the wash cycle but wont spin fast enough to dry clothing. Even when you select the spin cycle and turn on it usually just turns at a low speed and cannot seem to move up to fast spin. It appears that a sensor switch is faulty and reading on the forums could be the door lock mechanism. I can here a click every so often. Any help gratefully received.