7. CHECK THE CONTROL PANEL
If you have checked out the above solutions and still find that your refrigerator temperature is too low, your control panel may be in showroom or demo mode. If the control panel is the cause, you can resolve the issue by resetting your refrigerator.
Unplug the appliance and wait 5–10 minutes before plugging it back in, then set the temperature to 38–40ºF and test to see if the control panel is responding. If the panel is still not working properly, you may need the help of a professional.