Please help!

I have a 3 year old AquaPure Salt cell, that appears to be woking sporatically at best. Panel indicates that the cell when turned on has flow, but service light has come on with codes 125 & 194. I have cleaned the cell in acid wash, and last evening tested with a new sensor and new power cord and received the same error codes above.

This morning currently it appears to be switching from cell on/flow ok to waiting mode with no lights on at all. So I am trying to determine if time to buy a new cell, or if there could be some other issue?? What other test should I try to determine problem?

Thanks.