If your RCA refrigerator light not working, start with the parts that fail most often: the light switch, the door switch, and the light socket. Those three are common causes when the interior lamp stays dark even with the door open. If the switches and socket test okay with a multimeter for continuity and voltage, move on to the bulb itself and the light assembly — sometimes the bulb is simply burned out or the assembly must be replaced because manufacturers sell them as one unit. A defective dispenser control board is possible but much less likely; check the board for burn marks and use a meter to confirm it is sending voltage before swapping it. For straightforward DIY checks, press the door switch, swap in a known-good bulb, and test the socket with a meter. Enter your model number on RepairClinic.com to see the exact replacement light, switch, socket, or control board that fits your specific refrigerator.
01 - RCA 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.