Frigidaire Fridge Why Is My Frigidaire Side By Side Fridge Not Cooling?

Why is my Frigidaire side by side fridge not cooling? - frigidaire fridge

This is the model number P / N 241 543 930. The motor runs but not cold. I have tried every setting to relax or "cool" and tried in the evening, but still cool. The motor still works, but not cold. What is the problem that must be replaced or done, and what are the costs? Thank you!