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Caloric Microwave light bulb not working

If your Caloric microwave light bulb is not working, start with the light bulb itself, since it may simply be burned out. Replacing the bulb is the most likely fix for a microwave light not working. If your model uses a halogen lamp, test it for electrical continuity with a multimeter or install it in an identical socket. Next, inspect the light socket and wiring, then test the main control board to confirm it sends the correct voltage to the socket. A defective door switch can also prevent the cavity light from turning on or stop the light button from functioning. Test each door switch, including the primary, secondary, or monitor switch, for continuity. A control board or micro switch may be the cause when the bulb, socket, wiring, and door switches test good, although control board failure is less common. Enter your microwave model number to find the exact light bulb, halogen lamp, socket, door switch, micro switch, or control board for your Caloric microwave. 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. Proper capacitor discharge is required, so use a qualified technician if you are unfamiliar with the procedure.

01 - Caloric 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 - Caloric 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 - Caloric 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 - Caloric 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 - Caloric 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 - Caloric 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 - Caloric 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 Caloric microwave light bulb not working?
How do I test a Caloric microwave halogen lamp, light socket, or wiring harness?
Can a door switch cause my microwave light bulb not to work?
When is the control board the cause of a Caloric microwave light that is out?
How do I find the correct Caloric microwave light bulb replacement?