Jan,

If the motor's turning then the impeller is probably turning as well, but the channel from the pump's basket, or from the impeller to the filter may be jammed. You COULD try disconnecting a fitting from the filter and seeing if it works then, spraying water. If it does, your filter is jammed and it's not your pump.

Of course, if the motor is humming and not turning your impeller is jammed. But try disconnecting the output first (turn the filter to CLOSE first)....did you check your Multivalve to make sure it's on filter?

Just checking the obvious stuff...we all miss it. I did it last night. I just got a replacement for a Dell that had problems right off the bat (Dell was good about sending me a new box). But no sound! I went crazy and finally logged on to on-line support. The guy asked me if the speakers had a USB plug. I had never heard of such a thing on speakers but...he was right. They use the USB for power. I plugged it in and...felt really, really dumb. Diagnosis: "Idiot User Error"!