I have a Whirlpool Duet Washing Machine, model WFW9550WR00. Recently, it has decided to stop working and is displaying the error code "F30". Following your directions, I have replaced the dispenser motor. Also, the linkage connector arm seems to be set correctly and shows no signs of wear or weakness, and the wiring from the dispenser motor to the board seems to be intact with no abrasions to the outer sheathing. I assume that the next step will be to order a central control unit. Can you tell me, specifically, what part I need for my particular unit? Thanks for your assistance.

You are correct in your diagnosis however I do have some bad news for you. The central control unit for that model which is part number W10251767 is no longer being manufactured so you can't get it anymore.