If your refrigerator light is not working, start simple: replace the bulb first — a burned-out bulb is the most common cause and the fastest fix for a fridge light not working or a refrigerator light out. If a new bulb doesn’t help, check the light socket for power with a multimeter; a powered socket and a dead bulb means the socket is bad. Next test the light switch and the door switch for continuity, since a faulty switch often causes the refrigerator interior light not working. If those parts look good but the fixture still fails, the whole light assembly may be defective — some models only sell the complete assembly. A defective dispenser control board is unlikely but possible; look for burn marks or use a meter to see if the board sends voltage to the light connector. For the exact replacement part for your make and model, enter your model number at RepairClinic.com to find parts that fit and step-by-step guides to get the light working again.
01 - E-Wave 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.