Transplants

Thanks Did you replace it with a chloromatic or jandy And where did you purchase it.

The cell is 6 years old

I have a chloromatic III cm601 that has the codes 120 or 121 depending on when I look. The temp is good, the flow is on, and the salinity looks good as well. I also have cleaned the cell. Any ideas where to go from here before spending money to replace the cell. Is it a sensor or board. All advice welcomed