My hayward reads salt level as 4000. I've tested, and had pool store test in past 24 hours, both came out nearly the same at 2583-2600. I've tried the calibration method many times. It starts out at 4300, and never goes down past 4000. I have a new cell I put on a week ago. It shows its producing chlorine. I called Hayward today, and they said they would have a tech call. No one called back today. Any thoughts are appreciated.