or this..
from epinions.com
After receiving increasingly frequent F11 error codes during the spin cycle this is what appears to have worked for me: remove and study the washer wiring diagram and fault code description documentation found on the inside lower right wall of the HEt4 after removing 3 screws to remove the lower front panel. F11 is described as: Communication between the Central Control unit and the motor control unit cannot be sent correctly. This indicated to me a loose connection at the plugs associated with this signal path. After studying the wiring diagram I removed and reinstalled the M13(1,2,3) and the MS2(1,2) connectors at the Central control unit (connecter labels are found on the control board) located top center rear of the washer, after removing the top cover by removing several screws at the top back of the cover. I also tried to close the gap on the female pins on the M13 plug when I removed it at the central control unit (CCU). I also removed and reinstalled the same two connectors at the Motor Control Unit (MCU). The MS2 plug at the MCU seemed to be loose. This has seemed to work, at least until the connectors shake loose or develop a weak connection again. If this didn't work and I suspected relay problems on the CCU board I was going to order a new CCU Assembly from Appliancezone.com: Washing Machine Central Control Unit.