I went through a similiar event two weeks ago when I was checking out the boat (2007 Puma) before our first tournament. My pump out wasnt working, and neither was the aerator or the recirc (cant remember which one). I originally thought I had a problem with the panel, and began checking voltage at the butt connectors of each pump. What I came to realize is that I wasnt checking the correct pumps. It wasnt until I checked all the pumps did I find the correct butt connectors for the pump out. Turns out I had voltage at the connectors, and the pump was in fact frozen. Changed out the pumps and all is good now.