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HomeRepair HelpJenn Air Microwave RepairJenn Air Microwave light bulb not working Repair

Jenn Air Microwave light bulb not working

If your Jenn Air microwave light is not working, the light bulb itself is the most likely cause. A burned-out microwave light bulb or cavity light should be replaced before testing other parts. If your model uses a halogen lamp, test it with a multimeter for continuity or install it in an identical socket to confirm whether it has failed. Next, check the light socket and wiring for damage or loose connections. If those parts are sound, the main control board may not be sending the correct voltage to the socket and should be tested before replacement. A defective door switch, including the primary, secondary, or interlock switch, can also prevent the light from turning on or stop the door-controlled light function from working. A failed control board or micro switch is possible but less common. Enter your Jenn Air microwave model number to find the exact replacement light bulb, halogen lamp, socket, switch, or control board for your appliance. Any repair that requires opening the outer cabinet must be handled carefully because the high-voltage capacitor can store a lethal charge even after the microwave is unplugged. Properly discharge the capacitor before interior work, or contact a qualified technician if you are not familiar with the procedure.

01 - Jenn Air 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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Top Solution

02 - Jenn Air 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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03 - Jenn Air 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 - Jenn Air 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 - Jenn Air 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 - Jenn Air 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 - Jenn Air 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 Jenn Air microwave light not working?
How do I test a Jenn Air microwave bulb or halogen lamp?
Can a Jenn Air microwave door switch cause the light bulb not to work?
Could the Jenn Air microwave control board be the reason the light is out?
How do I find the correct Jenn Air microwave light bulb replacement?