I have a 2 year old Dig-220 by Autopilot. It was working great until 2 weeks ago when it started saying that I needed to add salt. I had the salt level checked and it was 3100ppm. I recalibrated the salt level in the Autopilot which solved the problem for a few days. Then it says add salt again. I re-tested the level at the pool supply store and it was 2800. The display says 2200. When I try to recalibrate, the display will recalibrate to 2300 or stay at 2200 (even though I set it to 2800) then it stops. It won't calibrate higher.
Autopilot customer support says they think I need a new board, but they didn't sound convincing. Anyone have other ideas? Can the salt sensor go bad? I checked the wiring, wiring connection & I took off the "U"bend & flushed it with fresh water a couple of times. Tried a power down also. No help.
I'd hate to change a 2 year old board if that's not the problem.
BTW ..this is a great site.