Re: Miele g641 dishwasher
Inlet/outlet fault is generally a water level fault in the machine rather than a waterproof system fault.
Commonly this is a failure of the pressure switch attached to the wash pump, or a partial blockage in the wash pump so that it doesn’t always produce enough pressure for the switch.
You should be able hear the switch activate when the wash pump is started and stopped while water is in the machine.
Another cause is a fault in the inlet not allowing enough water into the machine.