If your refrigerator light isn't working, you don't always need to replace it. The refrigerator can operate without a light, but the light allows you to see the contents of the unit. It is simple to troubleshoot a refrigerator light by following these tips
Inspect the Power Supply and Breakers
To troubleshoot the refrigerator light, you need: an Ohm meter, a putty knife, a cloth, and needle-nose pliers. Check to see if the cord has been disconnected or damaged. Sometimes, cords accidentally get pulled from the outlet by accident.
If the unit still doesn't work after you plug it in, test the plug with an Ohm meter. Set the Ohm meter on the lowest setting, then touch the metal probes to the switch. An infinity reading means the cord needs replacing.
If the cord looks good, and there is current, try another outlet, or replace the cord with a three-prong cord. A two-prong cord may not give it enough power.
Inspect the electrical panel for tripped breakers. A tripped breaker will often move to the middle or opposite direction. Flip the breaker back to the original position, and test the light. A tripped breaker is commonly caused by too many appliances on the same circuit.
Check the Door Light Switch
The door light switch signals the light to turn on when you open the door. Look for the light switch in the refrigerator, which is commonly installed on the back of the compartment. Ensure the switch didn't get turned off or get stuck by mistake.
Use a damp cloth to clean debris on the switch that may cause it to stick. Test the switch for looseness moving it back and forth. The switch should have enough spring to come open as you operate the door.
Cover a putty knife with clear tape to prevent scratching the refrigerator surface, and insert it under the slot, and pry off the switch, or detach the screw.
Use the needle-nose pliers to detach wiring, and note how they connect, or take a photo. Test the wire terminals for continuity as for the plug. If the door switch seems to have current, reinstall it, and proceed to test the bulb,
Examine the Bulb
Disconnect the plug from the outlet, if the bulb still isn't working. Unscrew the bulb from the housing by hand, then examine the filament, the long spring in the center. which should be silver or colorless. A discolored filament indicates a burned bulb, and it needs to be replaced.
Use the old bulb as a guide to buy one of the same size and wattage. An appliance ordinarily uses a 40 watt bulb that has a thin film. Clean the bulb cover with a damp cloth, then install the new bulb.
If none of these steps fix the problem, then you should contact a home appliance repair company to assess the situation.