My Arctica refrigerator model #

My Arctica refrigerator model # PSC23SQNBS freezes food, especially in the fruit/vegetable bin. This problem is new. I have the temperature of the refrigerator as high as possible. I have tried turning on the turbo feature, and that seemed to help for a while. But now when I do that it gives me a message in the temperature panel that looks like the bottom 2/3 of E followed by [.