Range Hood: Fan doesn't work
A failed electronic control board, faulty user interface, bad fan switch, wiring failure or failed fan motor can keep a range hood fan from running.
Unplug the range hood and check the wire harness connections between the control and the fan motor. Reconnect any loose wires and repair any damaged wires. With the range hood still unplugged, check the electronic control board for burn marks that indicate a control board failure and replace the control board if you find burn marks on the circuit board.
If your range hood uses a user interface control to start the fan, you may need to replace the user interface if it isn't sending signals to the electronic control board when you press the fan button. 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 hoods. If the electronic control board doesn't activate the fan when you press the fan button on the user interface control, you'll likely need to replace the electronic control board. If the fan still doesn't work after replacing the electronic control board, you'll likely need to replace the user interface control.
If your range hood uses a switch to activate the fan motor, test the fan switch for continuity using a multimeter (with the range hood still unplugged) to see if the switch allows current to flow to the fan when you turn the switch on. Replace the fan switch if you measure no continuity through the switch with the switch turned on. If the switch or the electronic control board sends current to the fan motor but the fan motor doesn't run, replace the fan motor.
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 fan motor
The fan motor spins the fan blade. If the fan motor hums or won't run properly when activated, replace it.
Replace the range hood fan switch
Some range hoods use an electro-mechanical switch to control the exhaust fan. The fan switch activates the fan and controls the fan speed. If the fan 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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