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HomeRepair HelpAdmiral Microwave RepairAdmiral Microwave light bulb not working Repair

Admiral Microwave light bulb not working

If your Admiral microwave light is not working, start with the light bulb itself, which is the most likely cause. A burned-out microwave light bulb or cavity light usually needs only a matching replacement, but some models use a halogen lamp that can be tested for continuity with a multimeter or installed in an identical socket. If the bulb and socket are good, inspect the wiring and test the main control board to confirm it sends the correct voltage to the light socket. A defective door switch, including the primary or secondary switch, may fail to tell the control board whether the door is open or closed, preventing the microwave light from turning on or the light button from working. A control board or micro switch can also cause a microwave light bulb not working problem, although these are less common. Enter your Admiral microwave model number to find the exact replacement light bulb, halogen lamp, socket, door switch, or control board for your appliance. If the repair requires opening the outer cabinet, unplug the microwave first and note that its high-voltage capacitor can store a lethal charge even when unplugged. Proper capacitor discharge is required before interior work, so use a qualified technician if you are unfamiliar with the procedure.

01 - Admiral 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

02 - Admiral 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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03 - Admiral 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 - Admiral 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 - Admiral 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

06 - Admiral 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

07 - Admiral 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 Admiral microwave light bulb not working?
How do I test an Admiral microwave bulb or light socket?
Can a door switch cause my Admiral microwave light bulb not to work?
How do I replace an Admiral microwave light bulb safely?
How do I find the correct Admiral microwave light bulb or replacement part?