Ben M Perris , CA December 31, 2016 Appliance: Whirlpool Dryer GEW9200LW0 Whirlpool Dryer Gew9200lw0: The knob on the thermostat was broken. How to replace Thermostat Knob. I finally found the tight knob and it works perfect 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes