First I changed the pressure switch and cleaned out the pump catch, This did not work. Then I replaced the central control unit. That was the problem, everything working great. I took a picture of how all the wires are hooked up,which was a really good idea. As soon as I had the old brain disconnected, I would have had a really hard time remembering which wires went where. Take my advice and take a picture! It will save you some time if you don't have a photographic memory.