The microwave worked sporadically. Sometimes jiggling the door worked or multiple opening and closings. The final straw was when the microwave turned on by itself while I was washing dishes. It was unplugged until a repair could be made.
I opted to replace the entire door switch assembly rather than individual switches since this is a more cost effective approach. There is no need to uninstall the microwave, just leave it in place.
Remove the top vent grill completely (two screws). Remove small plastic grill above control panel (one screw). Remove the control panel with its multiple wires (one screw) by lifting up and out and have a second person hold/maneuver it while you focus on the door switch assembly.
The door switch assembly is attached with two screws. A short handled fillips would be handy although I was able to complete the project without one. Patience and hand dexterity are the keys to removing the assembly after the screws are out. The wires attached to the three separate switches can be easily pushed off the metal clips with a screwdriver to allow these wires to be moved out of the way. After installing the new assembly, reattach the wires to the switches making sure they are properly aligned with the metal clips. Again, patience and dexterity are key.
Microwave now works like a charm. I bought another assembly to keep on hand since it appears the door switches are a weak link in this unit. Do manufacturers field test their products anymore?