It took almost four hours, but they finally found the cause of my left slide not working--a fuse! But not an ordinary fuse in the usual fuse panel--no, this one was in the controller which was hidden in a plywood compartment under my bed which also contains my rear furnace and converter! Who would have thunk it????
And to get to this controller and fuse, you have to lift the bed, prop it up, and then unscrew the cover to this plywood compartment. Not a typical place to hide a controller. Anyway, I will know to have someone check this if it happens again. Also, I learned that Fleetwood does not provide electrical schematics to dealers because they change the way they wire their RVs so often, so the mechanic had to trace the wires from the switches all the way to the slide motors and then back to the controllers.
Remember the old story??? My version is $1 for the fuse, and $155 for knowing where to find the fuse.
Oh, and it was a little warmer today. Actually had to use AC when I got to my campground early this evening. Hopeful for tomorrow.