If the light itself is newly installed or shows no signs of damage, yet still won't work, it's possible the light socket is defective. You can use a multimeter to test whether or not voltage is reaching the light socket. If the meter shows that power is reaching the light socket then it's likely the socket is malfunctioning and will need to be replaced.
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The dryer control panel indicator lights are part of the control panel assembly and cannot be replaced separately. If an control panel indicator light is not working, the entire control panel assembly will need to be replaced.
The dryer control panel indicator lights are part of the touchpad and control panel and cannot be replaced separately. If an control panel indicator light is not working, the entire touchpad and control panel assembly will need to be replaced.
The dryer control panel indicator lights are part of the user control and display board and cannot be replaced separately. If an control panel indicator light is not working, the user control and display board will need to be replaced.
The dryer door switch will turn the interior light off when the door is closed and turn it back on when the door is opened. If the switch is defective, it may be unable to allow voltage to reach the light. You can use a multimeter to test the door switch for appropriate electrical continuity when actuated. If the switch doesn't provide appropriate continuity, it will need to be replaced.
The most likely cause of a dryer interior light not working is a defective light assembly. Inspect the assembly for any visible damage or burn marks and replace as required.
The most likely cause of a dryer interior light not working is a burned out light bulb. Inspect the bulb for a broken filament or burn marks inside the glass and replace the bulb as required.