Yeah I figured that subject would get your attention.
I uncovered the pool a couple days ago and fired up the pump. Everything seemed fine - enough suction to run the pool cleaner.
Today I went to check on the pump and I see there's no water moving. One of the knobs that holds the basket lid closed is not on - I think someone must have cleaned the leaves out and not screwed them both on, and I guess what happened is the pump ran all day with no water moving.
There was a bit of water in the pump basket and it was darn near (or perhaps actually) boiling. Even an hour later the water is too hot to stick my hand in. I guess the whole inside of the thing heated up quite a bit running dry all day.
So, now what. I don't know if this has seriously damaged the thing, or if I can just seal it back up, turn it on, and expect it to be fine.
The motor still runs, and it sounds okay .. but I didn't let it run long enough to prime. (It always seems to take a long time to prime - many minutes - don't know how normal that is).