My salt cell is about a year and a half old and I noticed that the flow light was red, after verifying that there were no obstructions and acid cleaning it I reattached it and the light was still red. After some research online everything pointed to replacing the flow switch. I just replaced it and the flow light is still red. I don't think there is a flow issue as all my popups are working correctly and my water feature is working as designed. Could it be that the cell needs replacing or maybe the circuit board in the power management box?