A new mystery as my pool starts to clear up.
My pump has taken on a new trait. Every 15-20 minutes or so, it trips the 110V/20AMP breaker and shuts itself off. This just started happening in the last few days.
It's not the timer, as the time pins have been removed. It's definitely the breaker, as I have to reset it.
Pump seems to pump great in filtered, bypass or waste mode for those 15-20 minutes. I put my hand on the motor and everything seems only moderately warm. There's no big spark or pop or anything when it shuts down.. it just powers off with the breaker.
Skimmer and main drains are both on. Both the pump catch can and skimmer are free of debris. There's plenty of water getting into the pump, as I can see by it splashing around violently inside when the pump is on.
So... what could be causing my pump to trip the breaker?