If your refrigerator light not working, start with the parts that most often fail: the light switch, door switch, and the light socket are the usual suspects. Those switches can lose continuity and sockets can lose power, both of which you can verify quickly with a multimeter. Even so, swap the bulb first—an easy, fast check—and then move on to the socket or switches if the new bulb still does not light. If the fixture itself is damaged, some models require replacing the entire light assembly. A defective dispenser control board is less common but can be the cause on models with dispenser or dispenser-mounted lighting, so inspect the board for burn marks or test for output voltage before replacing it. Whether you need a bulb, switch, socket, complete light assembly, or a control board, enter your model number on RepairClinic.com to find the exact replacement part that fits your fridge, along with repair help and parts diagrams to guide you through the fix.
01 - Gibson Refrigerator Light Assembly
The light assembly might be defective. Some manufacturers don’t sell the light assembly components separately, and instead require you to purchase the light assembly.
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While it's not a likely cause, a defective dispenser control board could be responsible for a dispenser light not working. You can inspect the board for signs of burning or a shorted-out component. You can also use a multimeter to determine if the board is sending voltage to the dispenser light's plug-in connecter. If no voltage is present, you'll know the board is defective and will need to be replaced.
To determine if the door switch is defective, use a multimeter to test it for continuity. If the door switch does not have continuity when activated, replace it.
To determine if the light socket is defective, use a multimeter to determine if the socket is getting power. If the socket is getting power, but the light bulb won’t work, this indicates that the light socket is defective. If the light socket is defective, replace it.
First, ensure that the light board is receiving the proper amount of voltage. If the light board is receiving sufficient voltage, but the refrigerator light will not work, replace the light board.