If your refrigerator light not working, start with the parts most likely to fail and work down the list so you don't swap expensive components for a bad bulb. On many Maytag units the whole light assembly is the top culprit, and some manufacturers sell it only as a complete unit. Next check the bulb itself and replace it before moving on. If a new bulb does not fix the problem, test the light switch, the door switch and the light socket for power and continuity with a multimeter; these are common failure points when the refrigerator interior light not working. A faulty dispenser control board can cause a dispenser light issue, but that is less likely. Follow simple tests first and replace only the part that fails. Enter your model number on RepairClinic.com to pull up exact replacement light assemblies, bulbs, switches and sockets that fit your fridge, plus step by step guidance and replacement parts if you need them.
01 - Maytag 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.