A couple weeks ago I replaced the seal plate gasket on my Pentair Whisperflo 1.5 hp pump to fix a leak. It no longer leaked and ran fine for a week or two before I noticed it was not running and the breaker was tripped. Never had an issue with the pump other than this recent leak. Pump is from 2007. I'm not experiencing the humming noise before tripping, that some others have noticed with a bad start capacitor. I just get nothing. I can't get the breaker to stay on at all. Should I replace the start capacitor anyway? What else should I test?