I have a Bosch slimline dishwasher, rather old, which has stopped working.
It tries to start a cycle, but no water seems to go in and the timer dial
stops going round at the first click. I tried filling it with water using a
saucepan and still the dial din't move round. Then when I moved it manually,
it eventaully started washing, and a bit further round, it drained. Is this
likely to be fixable?

I've put a picture up www.aboleth.org/dw1.jpg pointing out what looks to be
collections of gunk or scale; could these be the problem? If so, how to get
rid of it?

Many thanks

John