Carsten N Joplin , MO July 30, 2015 Appliance: Whirlpool Washer WFW9200SQA11 Whirlpool Washer Wfw9200sqa11: F28 (connection problem between ccu and mcu). How to replace Motor Control Board. Took bottom cover off of washer to get to manual inside. Verified cause of F28 and removed MCU (Motor Control Unit). Found that control board burned out. Ordered replacement Thursday about 8:00pm received by FedEx on Monday. Installed replacement and washer works fine again. Installing part and getting everything back in place including test cycle about 30 min. 5 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes