Turned the breaker off first and foremost, removed the top back plate behind the Dryer. I took a picture before disassembly. I then removed the wires from the Timer with needle nosed plyers, and the one and only screw which takes a T-10 Tork Bit . Installed the new Timer, hooked the wires back up. Before replacing the rear panel, I did a test-run, then replaced the panel.