Fortunately, according to our manual, there is a 2-year warranty plus a third year "pro rata" (whatever that means) or 8000 hours of operation "on the power unit and on the cell from the date of purchase." We are trying to get our pool company to respond to the problem, but it's a holiday weekend. I did email the owner, who poo-pooed it and said he doesn't believe anything dangerous is going on. He said if we have clear water then there is no problem.