I replaced the door switch sensor / interlock assembly.
The replacement was a little tedious because it was a tight space with many wires in the way. Most of the time was spent moving stuff around so I could get the assembly in place.
Also, I really wish I had one of those very short (3" or so) Philips #2 screwdrivers. I couldn't quite tighten down the screws holding the assembly into place as tight as I would have liked due to the angle I had to make against the screws as I only had a longer screwdriver.