A 10440740 Microwave Light Bulb component that illuminates the interior of a microwave oven when the door is open. W10440740 Microwave Light Bulb ovens to illuminate the interior of the microwave when the door is opened. It is a 40-watt incandescent bulb with a small screw-in base, commonly known as an E17 bulb. The light bulb is typically located behind a protective cover or lens inside the microwave and can be easily replaced by unscrewing the old bulb and screwing in a new one.

Remove the old light bulb by turning it counterclockwise. Insert the new 10440740   microwave light bulb into the socket and turn it clockwise to secure it in place. Plug in the microwave or switch on the circuit breaker to restore power.