Eric Y Lancaster , CA October 31, 2014 Appliance: Whirlpool Washer GHW9150PW2 Whirlpool Washer Ghw9150pw2: There was an f11 error at start of washing machine cycle diagnostics failed after c01. How to replace Control Board. Read numerous websites on how to troubleshoot problem. Reseating cables had no effect so ordered the MCU. Three washes later the problem is gone. Fingers crossed it won't reappear. 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes