OK, I tried the override button. The answer is that the back of the slide moved, but the front did not. This afternoon I will get some friends together and try pushing.
Instead of pulling the connectors on the controller, would unplugging from 110 and disconnecting the battery have the same effect?
This happened while I’m home. We planned to head out camping on Monday. If we can push the slide in, we may do some cramped camping (slide stays in) anyway. See what else foes wrong before taking it in for service. I was also worried about how to get it to the dealer for repair.