My husband unscrewed the back of the dryer and we laid the front down. Getting the Rotary Switch out was a challenge but I finally got it out. It is very tight. We then put the new one in and plugged in the wires to the switch. We plugged in the dryer to make sure it worked and then put the back on and put the dryer back in place.
Note: The video for this is really nothing at all like my dryer so it was not much help.
Thanks.