Have same problem - having taken the lid of the machine (after disconnecting it from the mains power!!) and removed the control panel (~6 screws) - I took the programme knob off (takes some pulling) and found the plastic is cracked so its just spinning and not turning the selection control.
Have just tried to superglue it - but am looking for a replacement part.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix washing machines.