miele g1022 dish washer fill drain light on

[ian redshaw]

hi
my miele g1022 dishwasher has the fill drain light flashing but not constant this has happened intermittent for about a year now all it does is start up the drain pump then goes to the light on and stops any ideas, i have checked filter for drain and clean out the none return valve in the drain.
help

 

[silverfox2019]

I've just asked a similar question and hope to get some ideas.