Product review (5 stars): We have had ours for 3 years with no problems
We have the 6700 - and have had 0 problems with it.  And we use it to death (5 + loads a week) - we would have killed a standard transmission washer by now.  No F1 errors - but then we live in newer home too. I read the reviews and kept waiting for the f1 error - but it never happened. Great machine - highly recommend.