One of my 6105 pumps wasn’t pumping today. The impeller rotates moves slightly every time the blue led on the main power dial pulses, so I know power is getting to the pump. But the main power dial only pulses briefly, no matter what I do. So I’m pretty sure my controller is shot. The controller is hard wired to the pump - is it replaceable? The pump is almost 3 years old (I think).