If your refrigerator light not working, the usual suspects are the door and light switches or a bad light socket, followed by a burned-out bulb, a failed light assembly, and only rarely the dispenser control board. Start with the easy checks: open and close the door to see if the interior light responds, then use a multimeter to test the door switch and the light switch for continuity and the socket for voltage. Replace the bulb first since it is often the simplest fix, and if the socket or switches show no power or continuity replace those parts next. If the socket and switches are good but the fixture still fails, the light assembly may need replacing. A defective dispenser control board is an uncommon cause, but you can inspect it for burns and test for output voltage to the light connector. Enter your model number on RepairClinic.com to find the exact replacement light bulb, socket, switch, assembly, or control board that fits your refrigerator and get step by step repair help.
01 - Whirlpool 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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03 - Whirlpool Refrigerator Dispenser Control Board
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.