I've been having problems with our MC250. So far I've found a lot of complaints on: http://www.wrekinwatersofteners.co.uk/wrekinwatersofteners/final.asp?id=198
One of these suggests a replacement head is the best bet and points you to:
http://www.wrekinwatersofteners.co.uk/wrekinwatersofteners/final.asp?id=198
I'm going to give it a go as I've had my original head off the machine today.
CoolCat
March 2009