If you're getting the f1e1 error code even after replacing the CCU, it means the CCU is (still) bad. Professor of Appliantology john63 gives us the poop on this one:

The F1 E1 error is a checksum error.

The MAIN BOARD is still at fault.

Checksum errors are "fatal errors".

The MAIN BOARD cannot verify internal data. (similar to being disoriented/confused)

http://en.wikipedia.org/wiki/Checksum

Buy the replacement CCU with a 365-day return policy here ==> http://www.repairclinic.com/PartDetail/Control-Board/W10309219/1876151?RCAID=24038

Source: Whirlpool duet washer mod# wfw9250ww01