Charles H Luverne , AL January 27, 2020 Appliance: General Electric Electric Dryer GTDP220EF3WW Ge Dryer Gtdp220ef3ww: Timer was hard to turn and kept cracking knobs. So we used pliers to turn it finally stripping stem. How to replace Timer Knob Assembly. Ordered new timer , although it seems hard to turn also.. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes