This a intergrated machine which just pumps as soon as you put it on any program. It’s only 18 months old.
Any ideas ??
I am suspecting the PCB it all looks OK.
Have these M/C got a sponge microswitch inside wich activates the pump when a small leak occurs ?
Have these machine got a presure chamber inside like the Bosch/Hotpoint that get blocked with muck ??
Still might be flooded as Penguin says above but this is one of the models that can be affected by power surges to the PCB
Do a search for “Diplomat AND reset” or “Smeg AND reset” on this forum and give the reset procedure a try – it may be that the PCB has defaulted to manufacturer’s settings and needs to be reprogrammed.