Michael D Washington , UT January 18, 2016 Appliance: General Electric Washer WJRR4170G0WW Ge Washer Wjrr4170g0ww: The washer timer/cycle selection knob would not engage it just kept spinning. How to replace Control Knob Assembly. I replaced the knob and timer switch as both had worn engagement teeth. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes