Food freezing in the refrigerator

There should be a sliding thermistor attached to the rightmost cooling fin in the refrigerator. There should also be an arrow on the side wall indicating what direction to slide it to raise or lower the temp.

Lower the slide to raise the temp
There may be other ways as well but I'm too bummed out to download your manual.

if the thermistor goes bad, the refrigerator defaults to running non stop. Replacing the thermistor fixed my similar problem