William H Tujunga , CA June 30, 2014 Appliance: Whirlpool Washer CAWS966RQ0 Whirlpool Washer Caws966rq0: Old knob was broken and kept coming off. How to replace Washer Timer Knob. Obtained new knob from Appliance Parts Pros and replaced. The barbed timer stem has a center piece that must be pushed in toward the controls. If you don't accomplish this the new knob may be broken upon installation. It should slip over the two barbed ends with very little effort. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes