hi gail having looking for a fault code my self for this dishwasher i found out that f1 is a faulty NTC not sure what this is.
f2 water leaking underneath
f3 heating fault
f4 drain pump failure
f6 no water supply
f7 flow meter failure
f8 over filling
f9 water value not closing
hope this helps , my drain pump is failing on mine hoping it is just blocked
good luck
Mike Hughes, February 2008