[sluggo]

The fact that the old one was pumping fine just starting to wear out and now a new pump on the same wiring is not working is strange.  Have you hooked the old one back up?  Perhaps the old one wasn't pumping enough because it wasn't getting the amps it needed from the controller board.  Are there any errors on the control panel?  I chased a similar problem last year and it turn out to be a bad control panel.  After I replaced the pump and the circuit board.

the only error I've gotten is HPF which occurred when the pump wasn't pumping any water, I assume it went into some sort of 'protection' mode as it should.
We believe the old one wasn't pumping enough water (water came out of the close thru hull just fine, it was the far thru hull that it just trickled) because the plastic impeller appears to be very worn, that it is you can see where it should be in the housing, but it is too worn to fit correctly.

As mentioned out solution is to go back to the name brand pump and forget the generic, should go on today or tomorrow, I'll let you know.

If we have any issues, I'll have the tech put a meter on to check the voltage etc.

Thanks for your help!! Sluggo

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the pump could have been air bound

as it turns out later this summer, we fought a similar problem.  It turns out the line from the thru hull to the pump had several checks or breaks in it, and yes was sucking air.  We replaced that hose (maybe at most 12"?) and it pumps like a champ now!!!