I have had the Hayward Swim Pure SWG since last year and it worked fine. This season, once the water warmed and we turned it back on, we have had nothing but problems...the check salt and check cell lights are continuously flashing. We brought our cell in and had it checked, Leslies pool said it was ok. We had our salt checked, it was low so we added salt. Put all back together, same result, check salt, check cell. The pool supply sent out a tech and they replaced the electrical unit complete with a new one, something was burned out. Still getting the check lights so they suggested we replace the flow sensor, so we did that, same thing, check salt, check cell. The only thing I can figure is he cell is bad? Has anyone had problems with this system?