I feel like this must be some kind of electrical problem but the circuit breaker didn't trip. Fired up the heater (Pentair MasterTemp 300) this morning for the first time this season just like every season. No issues. Came home to 82 degree pool. Nice, but should have been 85. Checked the heater. It was off. No error code, no lights, no power. Dead. Still warm to the touch. No circuits tripped. Our pool filter is set to shut off for the night at 8pm and lo and behold, when it went off, the heater LED panel powered up! No error messages. Just like nothing happened. Any ideas?