I have a 2 year old pentair ic40 chlorinator. Worked fine up until a few days ago. We cleaned it before installing this year. The unit sanitizer output lights are flashing green . Salt light is green as is the flow. I’ve tried resetting it. I’ve tried the boost mode but nothing works. After the boost mode I get chlorine to register but now it’s back down to 0 according to my test strips. This is my 2nd unit. Other ones flows switch died after 3 years. Do I have to buy another unit??