It's the DD603 & DS603 Series.
Done that and waiting 24hrs. If problem persists can you direct me to source of the 'small filter board'.
Don't worry, I'll rate you excellent when we're finished. I waited 24 hrs and after one wash the code F1 has returned. I took out the top drawer and found more water on top of the lower lid. I've dried that and will wait until tomorrow to try another wash. Maybe we have a faulty top lid.
Did a wash cycle. Bottom drawer OK. Top drawer washed OK but there was still water in it. Do you think there is a pump problem?
Where have you gone? I explained last night that there was still an f1 code and water in the drawer. You said previously that I needed to rate you but you would stick with my problem at no extra cost. I rated you excellent but where are you?