Dryer would not shut off.

First, let me thank the others who weighed-in on this repair - it was helpful. Since he likes helping dad, I actually had my 12-year-old son perform the timer replacement (with my supervision, of course). Start by unplugging the machine. Remove the timer control knob and be sure to salvage the little metal piece that slips over the control shaft. You will reuse this on the new timer. Next, remove the (4) Torx screws on the top of the control panel and tilt the panel forward. The old timer twists out counter-clockwise. Move the wires over to the new timer one at a time then put everything back together. Presto, the dryer shuts off like it should! Very satisfying little father/son repair.