I have a 5 year aqua pure 1400 system. Last year I replaced the flow sensor and all worked well. After noticing no chlorine production and getting 120 errors I cleaned the cell. however this did not solve the issue. So I replaced the cell this year with a new one. Everything works well on the main board, and I have not got any error codes...however, still no chlorine production.
I boosted the production to 100% and ran the pump for 24 hours. After that I turned up production to 65% and ran it for another 24 hours. Still nothing?