The front panel is held on by a series of clips - 2 of which are difficult to see.One is down the left hand side of the dispenser and the other is under the control unit ( try and get this one off first ) .The one under the control unit is difficult I eventually broke it - not a big deal !
You will also have to remove the control knob - the cover of the knob will come off by turning it anti - clockwise .Once this is off use a socket to remove the securing nut .When putting this back to-gether you'll notice the assy is keyed .
Replacing the switch and button is basically self explanatory + it's probably only the switch which is gubbed .
PS the only other way to get at the clip below the control unit is to remove the unit itself...didn't have the confidence at the time to do that .
Gordon ..answered my own question !
September 2006