Your LG refrigerator is equipped with a DEMO MODE or DISPLAY MODE. This feature disables all cooling in the refrigerator and freezer sections to conserve energy while on display in a retail store.
When DEMO MODE is activated, OF F will appear on the control panel.
For most models, to disable DEMO/DISPLAY MODE:
With either refrigerator door opened, press and hold the REFRIGERATOR and ICE PLUS buttons at the same time for five seconds.
After holding the buttons for five seconds, the control panel will beep, and the temperature settings will display to confirm that DEMO MODE is deactivated.
Refer to your owner's manual for model specific instructions.