Bottom arm of Neff dishwasher wont spin, any ideas?

The bottom arm of my Neff dishwasher refuses to spin. There seems to be pressure enough for jets to hit the top of the inside though. The arm seems to spin Ok moving it manually. I assume the pump is failing or the water supply to the arm must be reduced by a partial blockage. Any ideas what it could be or what I should do?
Thanks!
David, August 2005


done
David
Try clean the end of the sprayer arm they are slightly twisted ,they acutully make the arm rotate ,if they are blocked will prevent it from turning.
If they are clean,then the problem the main motor

Toubi, September 2005
link Click here to see other fixes for Neff.