Dryer would not shut off

Unplug the dryer.Pull out from wall and remove the torx bolts from the back of the control panel.You'll sort of tilt the control panel back enabling you to reach the dryer timer.Make sure you don't pop out the wires on the other switches.The start button for example(I accidentally did.)Observing the location of the wires on the timer being replaced twist and pop it out.Install the wires onto the new timer and pop it back in.I recommend doing a quick test to see if repair was successful before putting the dryer completely back together.