Have Hayward Power Flo 1 hp. Approx 5 years old.

Was working fine 2 days ago, had a return pipe to bust so I replaced pipe. I believe the receptacle for the pump may have been a "little" wet when I plugged it back in, and pump hummed but did not run. So unplugged it, plugged it back in, it hummed again and it tripped the GFI circuit.

I thought I had blown the pump at this point, so we ran a heavy duty drop cord to it, plugged in up and the pump came back on but LOUD, almost at a deafaning pitch. Not really a vibration, or anything just loud. Unplugged it.

Waited a little while, reset the GFI and plugged the thing back into its normal receptacle, and it still works, but still just as LOUD.

There is no way I can run this pump with it being as loud as it is, my neighbors would call the law. Any ideas what would make a perfectly functioning pump all of a sudden do this?

I tried backwashing, rinsing, checking all baskets, etc.

Any other suggestions? Thanks so much.