So I'm 90% sure my AutoPilot 16084 board has failed, just going to confirm that with AquaCal in the morning but has anyone ever found a reasonable price for these boards? I can't find anything less than $600, and these boards use to be $250-300 not that long ago. I am trying to renovate an old system and used to have the DIG-220 myself so I thought, cool. No sweat. BUT, after replacing the cell, tri-sensor, display control, and housing, I STILL got the dreaded "Purifier off. Check flow" error. Before I spend another dime on this system (which has already been extravagant compared to other products on the market, and compared to the cost of pre-covid parts), I was hoping someone might be able to help point me in the right direction as far as troubleshooting goes. All contactors are OK and seated properly, and I can't see any physical damage to the board so at this point there is nothing else I can think of.