I had a 74620 with error C9. Replaced the brushes (they seemed worn) and then pressed start button first then turned program selector to the left and the C9 disappeared and the normal programs appeared. I left it on spin and let that complete (I was so excited that it was working I didn't want to touch anything and ruin it) Very easy to change brushes and only cost £20 for parts ( may be able to buy cheaper on an internet site) Hope this helps.
happy washer, December 2009