Lisa T Clarksville , TN July 01, 2018 Appliance: Roper Washer RTW4516FW1 Roper Laundry Center Rtw4516fw1: Electrical. How to replace Knob Spring Clip. The part was the wrong part I have to reorder. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes