First unplug the dryer. I then unscrewed the 6 screws in the back of the top panel and laid the panel on top of the dryer and took a picture. I put the new timer next to the old one and unclipped each wire from the old timer and then clipped each wire on to the new timer. When I finished on my dryer the timer unclips out turning to the left, once it was out I moved the new timer into position and turning it to the right clipped it into the panel. Lifted the panel up and screwed the 6 screws back into the top panel. Plugged in the dryer and everything worked fine. Now the door switch arrived a few days later, so I had to start again unplug, 2 screws out of the top of door, take off the top panel, take the 2 screws out that holds the door on, took a picture of the old switch and where the 3 wires go because you have to unhook wires and then take the switch out using a screwdriver to unclip the side of the switch, clip the new switch in making sure the wire clips are facing the right way, look at the picture and reattach the wires, put the door and top piece back together. My dryer is 11 years old and I have changed both coils, and the top door bearing/slides, so I am familiar with taking apart my dryer. Before I purchase a new one I like to try and fix things.