The 3 most common part(s) or condition(s) which cause the symptom Refrigerator freezing food are listed below starting with the most likely. Check or test each item and watch any available videos.
RepairClinic Item # 1057763
If the refrigerator is freezing food the thermistor might be defective. The thermistor is a sensor which monitors the air temperature. It is connected to the control board. If the thermistor is defective the refrigerator does not cool or may cool continuously.
RepairClinic Item # 1055219
If the refrigerator is freezing food the main control board might be defective. This is not common. Check the thermostat, damper, fans, and defrost system first.
RepairClinic Item # 907713
If the refrigerator is freezing food the air damper control might be stuck open or broken. The damper is either an automatic or manually operated door which opens and closes to let more or less cold air into the refrigerator compartment. If it doesn't open properly it will let too much cold air into the refrigerator.