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Montgomery Wards Microwave light bulb not working

If your Montgomery Wards microwave light is not working, the light bulb itself is the most likely cause. A microwave light bulb can simply be burned out, so replace the bulb before testing other parts. If your model uses a halogen lamp, test it with a multimeter for continuity or compare it in an identical socket. If the bulb or lamp is good, inspect the light socket and wiring, then test the main control board to verify that it sends the correct voltage to the socket. A defective door switch can also prevent the control board from recognizing whether the door is open or closed, keeping the microwave light off or stopping the light button from working. Test each door switch for continuity and replace any failed switch. A separate control board or micro switch may also be responsible, although control board failure is less common. These steps apply whether you call it a microwave light bulb not working, microwave bulb not working, or a microwave light burned out. Enter your model number to find the exact Montgomery Wards microwave light replacement part. If the repair requires opening the outer cabinet, remember that the high-voltage capacitor can store a lethal charge even when unplugged. Properly discharge it first, or use a qualified technician if you are not familiar with capacitor discharge procedures.

01 - Montgomery Wards 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 - Montgomery Wards 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 - Montgomery Wards 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 - Montgomery Wards 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 - Montgomery Wards 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 - Montgomery Wards 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

Frequently Asked Questions

Why is my Montgomery Wards microwave light bulb not working?
How do I know if a microwave door switch is causing the light not to work?
What should I check if the microwave bulb is good but the light is still out?
How do I find the right Montgomery Wards microwave light bulb or socket?
Is it safe to repair a microwave light that is not working?

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