Determined that the pump was always running when it was supposed to, but frequently was not pumping. Diagnosed an impellor problem, and knew that to fix a busted $.50 piece, I would have to replace an $85.00 pump. Ordered the pump and got it next day with standard shipping. I watched the video supplied, and it helped a lot with the sequence of things, such as attaching hoses and placing clamps before screwing the pump in place. Pay attention to how the new splash guard goes on, as I turned it over and around quite a bit before lining up the mounting holes. (I didn't have the video with me as I worked.)