Marc G New York , NY April 15, 2019 Appliance: General Electric General Electric GTDP180GD0WW Ge Dryer Gtdp180gd0ww: Dryer not heating and timer knob broke. How to replace Dryer Cycling Thermostat. Replaced timer--took less than 5mins. Heating problem was solved with a new dryer gas valve coil kit. Problem solved. I tested the machine and didn't need to replace the cycling thermostat. 18 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes