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Panasonic Microwave light bulb not working

Is your Panasonic microwave light not working? The light bulb itself is the most likely cause. A burned-out cavity light or LED light should be replaced before testing other components. Some Panasonic models use a halogen lamp, which you can test for continuity with a multimeter or try in an identical socket. If the bulb or lamp is good, inspect the light socket and wiring, then test the main control board to see whether 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. The control board and micro switch are less common causes, but each can be tested for proper continuity and voltage. Enter your model number to find the exact Panasonic microwave light bulb, halogen lamp, socket, door switch, or control board for your microwave. Replacing a bulb may not require cabinet removal, 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 - Panasonic 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 - Panasonic 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

03 - Panasonic 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 - Panasonic 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 - Panasonic 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 - Panasonic 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 - Panasonic 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 Panasonic microwave light not working?
How do I test or replace a Panasonic microwave light bulb or halogen lamp?
Can a Panasonic microwave door switch cause the light bulb not to work?
Could the control board, light socket, or wiring be causing my microwave light to stay off?
How do I find the correct Panasonic microwave light replacement part?