Hi I would be very grateful if someone could help me. The red light is blinking on my pool pilot and the screen is saying purifier off check flow. I was playing around with it yesterday and calibrated the salt it says I need over 450 pounds. That's kind of hard for me to imagine as just 3 months ago I put in an extra 3 bags and the balance was fine. Occasionally, temperature sensor gone bad also pops up on the screen, however it seems fine as it's giving me a reading of around 30c which seems about right. Don't know how to exactly troubleshoot the problem. I am thinking of throwing in 4 bags of salt to start!