Most refrigerators have lights that come on when the refrigerator door is opened. A small switch on the refrigerator front is engaged when the door is opened and closed. When the light continues to stay on when the door is closed, or the light doesn't turn on at all, you may have a faulty refrigerator light switch. Repairing a faulty light switch is similar between many refrigerator models but check your owner's manual to make sure you do not do it improperly.
Inspect the light bulb. Screw it in or push it into its socket if it is loose. Remove the bulb if it is not lighting and replace it with a new 40 watt appliance light bulb.
Unplug the refrigerator if the new light bulb does not work.
Locate the door switch. It will be somewhere where it will engage when the door is closed.
Slide a putty knife behind the switch and pry it off the refrigerator.
Pull out the connectors from the door switch. Pull on the connectors, not on the wires, to prevent damaging the connections. Use the model number on the switch to get a new one.
Plug in the new switch and push it back in the door. Plug in the fridge and test the new switch.