I have an AquaRite with T-9 cell that is not producing chlorine. FC in the pool says zero, but the water looks beautiful even through this massive heat wave this month. I inspected the salt cell and it is clean. This is my first time looking at diagnostics in depth, so please bear with my lack of knowledge as this is our first full season after installation last summer. I clicked through the diagnostics and saw that I had a salt reading of 5000, then all other readings looked good, including a -3100 setting. However, then it showed that my unit was set to T-3 cell. I tested the water at home, then took it to Leslie's and both readings were 3100. I just recalibrated my salt and it is now set to 3100. I also changed the cell to T-9. I just turned my unit to superchlorinate. I have no idea when or how the cell unit got to T-3...honestly, it could have been like that since it was installed last summer and I'd have never known the difference. Would that have caused the readings to go out of whack and no chlorine to be produced?