I have a hot spot relay 2012-2013 model made by Watkins, I bought is used and the filtration pump kept coming on by itself and Watkins customer service and my spa tech said I needed a new board, he talked me into a cheaper system made by United Spas. we have changed out the board, heater, and control panel three times and we still have the same issue with the filtration motor coming on and staying on for several hours and longer. I don't think it is the board at this point. does anyone know what else I can try. could it be a faulty pump some how?