Michael Z Crivitz , WI September 07, 2015 Appliance: Maytag Washer MFW9600SQ1 Maytag Washer Mfw9600sq1: Error code for 21 would not reset. How to replace Electronic Control Board. Ultimately it was the front control panel...that needed to be replaced....good as new ! 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes