F-12 No communication between circuit boards. Most likely a duff connection on one of the board connectors. power off, remove covers, disconnect circuit board connectors and clean with toothbrush. May help to tighten them with a pair of pliers. Clean off any corrosion or crud, refit and test.
Check out this site for info: www.2ndwave.co.uk/manual.html
Check out this site for spares : www.4directelectricals.co.uk
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix washing machines.