We've had our pool for about three years and all of the sudden this year the pump decided to run for about an hour, stop for 15-20 minutes and start again by itself. This has been going on for a month. Today it will only run for about 20 minutes before shutting down for 15-20 minutes and restarting again.
It is running on by itself on a separate circuit, no extension cord.
(24' round pool, 1.5HP single-speed Hayward pump, no chlorinator)