You need to remove the facia to get at the switch. Start by pulling the soap dispenser draw out as far as it will come (if it has a green tag in the centre press this while pulling the draw all the way out) If not just give it a tug and it will come free. Now remove the 4 screws on the facia that were hidden behind the draw front when it was in place. Over the top of the control knob on the metal frame work, there is a hole and if you rotate the knob you will see a clamping screw that holds it onto the timer shaft. Loosen this screw and pull the knob off. Remove the any screws that may be behind the knob (There should be 2 but some times they were not replaced). The facia panel should now be free. Remove the button from the switch by pulling it off and you will see there are 4 little wing type hooks holding the switch in place. Close the wing hooks in whilst pulling the switch and it should come free. To replace it you just push it in. Good Luck!
Casper ------ www.selfix-uk.co.uk, June 2009