I have not added salt in the last 6 months however my salt reading continues to grow from to 3.8 to currently 5.0 When I turn on the system most of the time it shows cell reversing and the service light is on. The screen will flash #145 that I understand is too much salt. The cell on light never comes on. I have cleaned the cell and sensor as per mfg instructions. This unit is only 15 months old. I sure would appreciate any suggestions that would save me a service call.