I have a Magnetek 8-177457-02 pump that is about 9 years old. It just started popping its internal breaker but not the one on the control panel. This internal breaker resets itself usually in less than 30 seconds. When I turn on the pump it runs for 2-3 seconds and then pops. By hand the impeller spins freely and I mean as good as new freely but for the 2-3 seconds the pump is on it does not spin at all. Any ideas? No odd noises from the pump in days prior, sounded perfect as well.