I got the dreaded F2E2 in the middle of a cycle with Add A Dish blinking. Called Sears and they told us it was a $25 part, so we scheduled service. They mailed the part which turned out to be a cosmetic panel from the bottom. :-) So, database error. Still, service guy from 3rd party company shows up and spends 3 minutes diagnosing the problem. Looks underneath and sees no water, so conclusion is that we need a new control panel and main board. Price tag: $675! He recommends we get a new dishwasher, though ours is only 4 years old. We send him away and I take the dishwasher apart. I study the diagnostic sheet found behind the cosmetic panel on the bottom. The very first thing to check for F2E2 is the gray cable between the control panel and the main board, so I take things apart enough to expose all the connectors. In particular, the main controller has an edge connector. I discover OBVIOUS corrosion on the edge connector fingers so I scrape it off, scrape the connector that plugs on, and spray everything with WD40. Voila! Dishwasher works fine. So, the repair person did not even follow the simple steps on the diagnostic sheet for the error code. Horrendous!