William S Miamisburg , OH July 24, 2014 Appliance: Whirlpool Washer WFW9500TW01 Whirlpool Washer Wfw9500tw01: Suds and f35 error code. How to replace Electronic Control Board (Main User Interface/Control). Bought new APS --but that part was not bad..Hired tech to come out and ordered the CCU unit from AppliancePart Pros and installed it and that fixed it. 8 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes