Choose Product
Identify Problem
03
Find Solutions
HomeRepair HelpRoper Microwave RepairRoper Microwave light bulb not working Repair

Roper Microwave light bulb not working

When a Roper microwave light is not working, the light bulb itself is the most likely cause. A burned-out microwave light bulb or halogen lamp should be replaced first, and the lamp can be tested for continuity with a multimeter or in an identical socket. If the new bulb still does not turn on, inspect the light socket and wire harness, then test the main control board to verify that it sends the correct voltage to the socket. A defective door switch may fail to signal whether the door is open or closed, preventing the cavity light or its control button from working. Test each door switch for continuity and replace any failed switch. A faulty control board or micro switch is also possible, although less common. This troubleshooting applies to a Roper microwave light bulb not working, microwave light not working, or microwave light burned out. Enter your model number to find the exact replacement part for your specific microwave. If any repair requires removing the outer cabinet, unplug the microwave first and note that its high-voltage capacitor can store a lethal charge even after unplugging. Proper capacitor discharge is required, so use a qualified technician if you are not familiar with the procedure.

01 - Roper 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
Enter model number to search for the required part specific to your product
Need help finding your model number?
Shop all Roper Microwave Light Bulb Parts
Top Solution

02 - Roper 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.
Shop all Roper Microwave Halogen Lamp Parts
Top Solution

03 - Roper 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.
Shop all Roper Microwave Main Control Board Parts
Highly Likely

04 - Roper 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.
Shop all Roper Microwave Door Switch Parts
Highly Likely

05 - Roper 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.
Shop all Roper Microwave Control Board Parts
Common

06 - Roper 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.
Shop all Roper Microwave Micro Switch Parts
Common

07 - Roper 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.
Shop all Roper Microwave Power Supply Board Parts
Less Common

Frequently Asked Questions

Why is my Roper microwave light bulb not working?
How do I test a Roper microwave halogen lamp or light bulb?
Can a Roper microwave door switch cause the light bulb not to work?
Could the Roper microwave control board be causing the light not to turn on?
How do I find the correct Roper microwave light bulb replacement?

Shop by Roper Microwave Parts

Roper Microwave Fastener Replacement Parts
Roper Microwave Lighting & Light Bulb Replacement Parts