Kenneth K Corona , CA October 12, 2019 Appliance: Frigidaire Frigidaire/Gas Dryer GLGR642AS3 Frigidaire Dryer Glgr642as3: Timer control knob on dryer. How to replace Timer Knob Assembly. Purchased a new knob, easy fix Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes