I have come to the realization that the recirculation pump is not fixable and needs to be replaced. The watkins SilentFlo 5000 is more than i can afford at this time so i just have the recirc pump unplugged. My new question is, can i use other recirculation pumps as long as they are the same voltage? My other thought was what about a small pond or fountain solar pump temporarily until i can save up for the real pump. Is there a place that sells used pumps? Thanks again.