Update - This evening I drilled out the rivets on the back panel and removed the screws holding the top handle and the tray's clips. I removed the two screws above and below the snap switch inside the MES. That allowed the cover over the snap switch-- visible with the back panel off--to be pulled away. One of the wires look a bit corroded and when I touch it the connection to the switch fell off. What I held in my hand was exactly like a photo in a post that I cannot find now that I am typing this.
The spade was still in that clip so I shoved it into the other clip I had removed thereby jumping around the snap switch. Plugged in MES and turned it on set to 225. It heated quickly and turned off at 227. It overshot to about 235 as usually and when it fell back to 223 it came back on. It reheated to 227. I smiled and watched it go through that cycle twice more. Unplugged it and will order a new snap switch.
Many thanks to Kurt, aka Dr. K, TallBM, and DaveOmak for the responses and advice. I can now cook the misses something special for Mother's Day. When I pointed that out to her she rolled her eyes and sighed. So that brings up the age old problem that you can help me with. How does a hard-working guy do something special for the special lady in his life if she does not really respect and put good home smoked meat above all the restaurant stuff? If only the problem was that she had a bad "snap switch"...of well...good night and thanks again.