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KitchenAid Microwave light bulb not working

If your KitchenAid microwave light is not working, the light bulb itself is the most likely cause. A microwave light bulb not working or a microwave light burned out usually calls for a straightforward light bulb replacement. If your model uses a halogen lamp, test it with a multimeter for continuity or install it in an identical socket to confirm it has failed. Next, inspect the light socket and wiring, then test the main control board to verify it sends the correct voltage to the socket. A defective door switch, including the primary or secondary switch, can also prevent the light from turning on when the door opens or closes. If those parts test good, a less common cause is a failed control board or micro switch. Enter your model number to find the exact KitchenAid microwave light bulb, halogen lamp, socket, door switch, or control board for your appliance. Replacing a bulb may not require cabinet access, but any repair that requires opening the outer cabinet must be handled carefully. The high-voltage capacitor can store a lethal charge even after the microwave is unplugged, so it must be properly discharged before interior work. If you are not familiar with capacitor discharge procedures, use a qualified technician.

01 - KitchenAid Microwave Light Bulb

The light bulb itself might be burned out. Replace the light bulb before replacing any of the parts associated with the light bulb
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02 - KitchenAid Microwave Halogen Lamp

To determine if a halogen lamp has failed, you can use a multimeter to test it for electrical continuity, or install the lamp into an identical socket to test it.
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Top Solution

03 - KitchenAid Microwave Main Control Board

Before replacing the control, check the light bulbs, sockets, and wiring. If these parts seem to be working properly, test the control board with a multimeter to determine if it sending the correct voltage to the light bulb socket. If the control board is not sending enough voltage to the light bulb socket, replace the control board.
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Highly Likely

04 - KitchenAid Microwave Door Switch

A defective door switch may not signal the control board that the door is open or closed which may prevent the microwave light from turning on or prevent the button that controls the light from functioning. To determine if any of the door switches are defective, use a multimeter to test each of the switches for continuity. If any of the door switches do not have continuity, the switch or switches should be replaced.
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Highly Likely

05 - KitchenAid Microwave Control Board

A microwave light bulb not working could be caused by a defective control board, although this is rarely the case. Before replacing the control board, check the light bulbs, sockets, and wiring. If these parts seem to be working properly, test the control board with a multimeter to determine if it sending the correct voltage to the light bulb socket. If the control board is not sending enough voltage to the light bulb socket, replace the control board.
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Common

06 - KitchenAid Microwave Micro Switch

A defective micro switch may not signal the control board that the door is open or closed which may prevent the microwave light from turning on or prevent the button that controls the light from functioning. To determine if any of the micro switches are defective, use a multimeter to test each of the switches for continuity. If any of the micro switches do not have continuity, the switch or switches should be replaced.
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Common

07 - KitchenAid Microwave Power Supply Board

A microwave light bulb not working could be caused by a defective power supply board, although this is rarely the case. Before replacing the board, check the light bulbs, sockets, and wiring. If these parts seem to be working properly, test the power supply board with a multimeter to determine if it sending the correct voltage to the light bulb socket. If the board is not sending enough voltage to the light bulb socket, replace the board.
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Less Common

Frequently Asked Questions

Why is my KitchenAid microwave light not working?
How do I test a KitchenAid microwave bulb, socket, or door switch?
How do I replace a KitchenAid microwave light bulb?
How do I find the correct KitchenAid microwave light bulb or replacement part?
Is it safe to repair a KitchenAid microwave light that is not working?