Robert S Libertyville , IL January 17, 2017 Appliance: Whirlpool Gas Dryer GGW9200LL1 Whirlpool Dryer Ggw9200ll1: Replacement dryer control knob. How to replace Control Knob. Ordering process was fast & easy. Delivery was prompt with the correct part. Changing the part was easy. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes