Rufus S Old Fort , NC August 20, 2016 Appliance: Whirlpool Washer WFW8300SW00 Whirlpool Washer Wfw8300sw00: F 28 the communication between the central control unit and the motor control unit cannot be sent correctly. How to replace Electronic Control Board (Main Control). Washer starting acting erratic, went from not spinning to not starting at all. I check water valve, door switch, and motor control unit (mcd) before I figured out it was the central control unit (ccu). 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes