Temperature compensation for the Refrigerator Compartment is available on some models using jumpers on the Main PCB. These jumpers will be labeled (JCR1-JCR4). They are Not Available for adjustment on all models so check the service manual for your specific model if you are needing to adjust the temperature a few degrees.
If your model has this adjustment available you will find a page like the below in the service manual. (This example is from model LSXS22423/00):
Simply cut the jumpers as needed to increase or decrease the temperature in the refrigerator section according to the tables below…
