I have a Kenmore refrigerator (model 106.8679381). Just recently the refrigerator and freezer were not holding the temperature range that it should. After adjusting the cold control knob to the max of 5, it seemed to make a little difference but still not holding very well. A few days later the temps started to fall w/in range very well and we thought everything was okay, even a little too cold. After slowly working the cold control knob down a little, it has started to do the same thing as before. Does that sound like a compressor or a thermostat problem?
If your freezer section is ok the compressor is fine. If the temperature in the freezer is getting too cold below zero the thermostat will either need to be adjusted or replaced. If the problem is only in the refrigerator section most of the time the air flow will need to be adjusted. This can involve adjusting both controls or just the damper control. If the temperature did seem to be ok when you adjusted it you can leave the controls where you had them. Conditions can change and the controls at times may need to be adjusted. If you need more assistance you can resubmit your question with more details.