I have a Aquatools 2speed 2hp pump(2 months old) plugged into a gfci. When I got home yesterday, the gfci wasn't tripped, the pump was on low speed, but wasn't working or making any noise. I reset the gfci, unplugged the pump, plugged back in, and turned the pump back to low speed. The pump would make noise but the motor wouldn't turn. Does anyone have any ideas? Is this pump bad or is it stuck?