You have an fridge that you can adjust temperature.....ie: you set it on 2
Moving thermistor will not correct your freezing problem in the food section.
Moving thermistor does affect those that have a factory pre-set temp (no panel adjustment button).
Freezing in food section is can be due to faulty thermistor...either has fallen down out of clip or is bad
You can test the thermistor
Unplug it from lower board (P2 pin)
Stick thermistor in glass of ice water (mostly ice) for 8-10 mins
With digital meter check resistance......8000-10,000 ohms
IF bad replace thermistor