First post, but I've done a bit of searching before posting and now have a question.
I have a 5 year old Jandy AquaPure 1400 cell that is throwing a 121 code. Prior to learning (via this forum) that the control center would display a code, I noticed the "General Fault" message on the remote and removed/cleaned the cell, twice. Each time quite a bit of scale fell from the cell and there was fairly vigorous bubbling. The system continued to throw the General Fault message, so I tried to clean the cell a third time, with virtually no reaction at all. The plates look fairly clean. There are a couple with persistent buildup, but even those have large areas of clear surface, at least to the eye.
Last night I did more research here, and this morning I removed the sensor and "cleaned" it with a scuff pad. It looked clean already, but I hit it with the scoff pad anyway. Needless to say, it did not cure the error message. The pump and cell are currently running and it is throwing the 121 code.
Time for a new cell?