If your oven light is out, the problem may be in the oven control board, light assembly, bulb, halogen lamp, light socket, or light housing. Although a defective oven control board is uncommon, it supplies voltage to the light bulb or light assembly, so test whether power reaches the socket or assembly with a multimeter. If the light switch has continuity but no voltage reaches the light, the control board may need replacement. Next, inspect the light assembly, since some range, stove, and oven models require the complete assembly instead of separate components. A burned-out oven light bulb is more common and can be tested for continuity or replaced with a matching bulb. If your model uses a halogen lamp, test it the same way. If power reaches the socket but the oven light still does not work, replace the light socket. A faulty light housing can also prevent the bulb or light board from operating. Before ordering an oven light replacement, enter your model number to find the exact bulb, assembly, socket, housing, or control board for your range, stove, or oven.
01 - Range/Stove/Oven Oven Control Board
The oven control board is used to send voltage to nearly all of the oven's electrical components including the lights. If the control board is defective, it may be unable to send voltage to the light bulb or light board, although this is not a common problem. You can use a multimeter to determine if power is reaching the light socket or light assembly. If power is not reaching the light socket or light assembly and the light switch tests positive for electrical continuity when tested with a multimeter, then the control board is likely defective and will need to be replaced.
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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.
Use a multimeter to test for power to the light socket. If the light socket is getting power, but the oven light won’t work, this indicates that the light socket is defective. If the light socket is defective, replace it.
If you've determined the light bulb has not burned out or the light board appears to be functioning normally, it's possible that the light housing the bulb or board is installed in is faulty. Use a multimeter to determine if power is reaching the light socket or light assembly. If power is reaching the socket or assembly, then it's likely the light housing is malfunctioning and will need to be replaced.