Hi Douglas, so long as the machine is doing the wash okay, no error codes coming up etc and it is just the dispenser then you will have to replace the dispenser unit.You have to take the decor door off then the outer skin.The disp will the be in front of you with 6 philips screws. take these out and the disp will fall in the machine after taking the wires off.reverse to fit the new one.This is assuming you have the SMEG manufactured diplomat machine.hope this helps. All the best.
FOXY
September 2008