I used videos to rule out other common causes of the dryer not starting to confirm the timer needed to be replaced. I ordered the timer and used the video on the AppliancePartsPros.com site to guide me in replacing the timer. I took a couple of pictures on my phone of the wiring to the old timer before I disconnected the old-timer. After connecting the new timer I checked my photos and the wiring to the new timer to see that they matched. The dryer now works for all timer settings.