I had to remove my pump from the strainer housing to replace a gasket. I had no problems whatsoever initially. I removed the four bolts changed the gasket put the pump back in place and tightened the bolts without incident. I turned the power back on and when I hit the on switch for the pump it just buzzed, nothing else. So the buzz indicates it's getting power, but nothing's happening. I tried running it unattached from the strainer housing and it still just buzzes, nothing else. Any ideas would be appreciated.