Jessica V Redding , CA August 20, 2016 Appliance: General Electric General Electric GTDX100EM1WW Ge Dryer Gtdx100em1ww / : Dryer timer knob broke. How to replace Timer Knob. Ordered the part from appliance parts pros, removed the old one and snapped the new one on. Took less then a minute and was the exact part I needed. Thank you! Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes