texter wrote:Code 90 low flow error. Finally found what the problem was on my 8110. Would turn on system and approx 30 seconds later 90 error code would appear. Traced it to the connection on the flow switch connector. Took some small needle nose pliers and carefully squeezed the female metal connections inside the rubber cord connector on the cable side so they would make a tighter fit. I was able to get the pliers in between the rubber socket and the metal crimp connector to avoid possible damage to the rubber seal. So far so good. Hope this helps someone.
That was the problem on my CS 15110 sand filter. I did the same thing and error code 90 disappeared!