How do I replace a light bulb in the refrigerator or freezer compartment?

First, unplug the refrigerator or disconnect power, then remove the light shield and replace the burned-out bulb with one of the same size, shape, and wattage — upper refrigerator compartment lights use a 2.0 W LED (part number W10574850A), while lower refrigerator and freezer compartment lights use a 3.6 W LED (part number W10565137A). Reinstall the light shield and reconnect power when finished. Note that on some models, LED bulbs in the refrigerator, freezer, air tower, and dispenser cannot be changed by the owner and require a service call. (Page 4)

From the official Whirlpool Wrs325sdhz Side BY Side Refrigerator manual, page 4

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