Range Hood: Lights don't work
A failed electronic control board, bad user interface control, broken light switch, bad light bulb sockets or a wiring failure can prevent the lights from working.
Unplug the range hood and check the wire harness connections between the light sockets and the control board or light switch. Reconnect any loose wires and repair any broken wires. If the wiring is okay, check the electronic control board for burn marks. Replace the control board if you see burn marks because the burn marks indicate a control board failure.
If your range hood uses a user interface control to control the lights, you may need to replace the user interface if it isn't sending signals to the electronic control board when you press user interface buttons. A user interface control is a keypad and display panel that sends signals to the electronic control board through a ribbon wire cable when you press its selection buttons. DIY testing of the user interface control isn't available for most range hood models. If the electronic control board doesn't activate the lights, you'll likely need to replace the electronic control board. If the lights still don't work after replacing the control board, you'll likely need to replace the user interface control.
If your range hood uses a switch to control the lights, unplug the range hood and test the switch for continuity using a multimeter to see if the switch allows current to flow to the lights when you turn the switch on. Replace the switch if you don't measure continuity through the switch when it's turned on.
With new light bulbs installed and the range hood unplugged, check for continuity through the light sockets with new light bulbs installed. Replace the sockets if you don't measure continuity through the sockets with new bulbs installed.
Replace the range hood electronic control board
The electronic control board operates the exhaust fan and cooktop lights in the range hood. If the electronic control board is getting power but won't activate the fan or lights, replace it. The electronic control board also operates the sentry system on models equipped with that feature. Replace the electronic control board if it isn't operating the sentry system correctly.
Replace the range hood light bulb socket
The light bulb socket holds the light bulb in place and connects the electrical leads on the bulb to the power supply wiring. If a light won't turn on when activated, first try replacing the bulb. If the new bulb won't turn on, the socket could be defective. Replace the light bulb socket if it's damaged or defective.
Replace the range hood light switch
In some range hoods, an electro-mechanical light switch controls the lights. The light switch also varies the lighting intensity in models with multiple settings for the lighting system. If the light switch doesn't work properly, replace it.
Replace the range hood user interface control
The user interface control sends selection signals to the electronic control board to operate the fan and lights in the range hood. If the electronic control board doesn't receive the selection signals when you press buttons, replace the user interface control.
The fan switch activates the fan motor in the range hood. If the fan switch is defective, replace it using the detailed steps in this repair guide.
The electronic control board activates the fan and lights in the range hood. If the electronic control board is defective, replace it using the detailed steps in this repair guide.
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