My thanks to those that preceded me. I never could have gotten this far without your information and pictures.
My unit was a later model with the microprocessor control. This replaced the problematic rotary switch. Much of the rest of the unit is the same.
I found using a thin piece of wood and a pry bar or claw part of a hammer made the side removal from the clips easy. Note the tape is to protect the sharp edges from cutting my fingers. The picture shows the pry bar position and the second picture the clips. I always do better when I can see what I am working with.
Finally the door switch seems to be a consistent problem. I added a picture of the numbers on the side of the switch in that helps.
My problem is a noisy fan. I thought it was the top cooling fan. There is a small computer cooling fan on the side of the plastic housing that holds the display and processor. It appears to be scraping the housing. Upon disassembly of the oven, the fan noise went away. Now, when reassembling, I will have to see what tweeks the housing, causing the noise.
I consider myself mechanically inclined, having worked for ten years restoring antique coin operated games like pinball machines and horse race games. This machine was difficult, what with hidden and far reaching screws, strong clips, and sharp edges. I strongly believe we should fix broken things. However in this instance, I suggest caution.
Michael