I had the pool built in June.
Everything was brand new. The Pentair Intellichlor recently started reading the flow as low (red light) so I opened up the filter system and cleaned out the cartridges real well, including using a shop vac to clean out any excess water. Put everything back together and it seemed to run fine.
However, it still reads low flow.
The problem is, if I put the speed at the 3rd setting (2350) it's fine and flow light goes green, water fills up in the filter and everything is fine. Whenever I go back down to the 2nd setting (1600) the water empties out of the filter and it goes to red again.
Am I doing something wrong? Is there something else I should be cleaning?
Thanks for any info. I have nobody to ask questions as the guy that sold me the pool isn't available.