I had released the negative terminal before I made the original post, but Jack’s reminder got me to do it again…I couldn’t remember how long I had it disconnected. While waiting, I went after the sensor by tapping it a couple times. …I brushed out and blew out anything that looked like a contact point (Thanks Thomas for showing me where it was). It started and continued to run without the warning. The AC kicked in and stayed on. Anyway, my Sat AM was saved.
Now I have more time to plant flowers for my wife and to be on Permies.