First I unplugged the unit. I removed 4 screws to remove the back plate. Removed 4 screws to remove the ERC unit. ( Plastic casing and all) Peeled the front cover off the old unit and stuck it on the new. Removed one wire at a time and plugged it into the new so I didn't mess up the wiring. screwed my 8 screws back in, plugged it in, and started cooking.