I've run into a few of these side-by-side GE refrigerators (first 3 letters of model are always PSS) that don't register the temperature correctly. The product temperature is measured at about 45 degrees, but the control panel up top says 27. The set point, however, is at 40.
I've changed out the damper door for a few and it doesn't really help anything. I've also tried to replace the thermistor a few times as well, but haven't had much success. On one, I'd changed out both the main control board as well as the one up top in the FF side. I haven't been able to really nail down what exactly is going wrong with these and would like to so that I can start getting better/faster diagnosis going for them since I see about one a week.