Move the refrigerator away from the wall and unplug the power cord from the wall outlet.
Pull away the light shield that covers the light bulb when necessary. Some refrigerators feature a light shield, while others simply have an exposed light bulb.
Turn the light bulb in the refrigerator clockwise to remove it. Set it aside after it is removed.
Insert a new light bulb and turn it counterclockwise to tighten it.
Replace the shield if necessary. These shields often click into place.
Plug the power cord back into the wall outlet and place the refrigerator back into its place.