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    Hayward Swim Pure (H 40)..Not Generating Chlorine

    Hello, my system is reading 3.7 on the display for "salt display", the default screen. It use to read 2700 or 2800. I do not know what happened. It rained very hard one day so I added salt. I cleaned the cartridge. I even added stabilizer. But, the reading is still showing 3.7 There are no error...