Wanda K Lake Wales , FL September 04, 2020 Appliance: Frigidaire Dryer GLER642AS3 Frigidaire Dryer Gler642as3: Knobs broke. How to replace Selector Knob. I took off knobs. Ordered new ones. When they came in 24 hours I put them on the dryer. They fit perfect. The dryer works. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes