I have a hayward navigator that quits working after 30 minutes. I have left it in overnight and when I look at in the morning it is the same place where it was the night before. The wings aren't moving. If I unplug the vacuum hose and them plug it back it, it will move again for a while.
Last year Leslie's worked on it a couple of times. Once time they even part something on backwards and I took it back and they fixed it.