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Broan Range vent hood turning on by itself

When your Broan range vent hood turns on by itself, the thermostat is the most likely cause. Some Broan hoods use a temperature-sensing thermostat that automatically starts the blower when heat builds up in the hood, then shuts it off after the temperature drops. Check your owner's manual or wiring diagram to confirm whether your model has this feature. If the fan or lights switch on intermittently, a failing control board is the next likely problem because burnt relay contacts or an electrical short can send power to the blower or lights without a button press. A worn touchpad can also close the circuit intermittently and turn on the hood. If some control panel buttons respond incorrectly or activate without being pressed, the user control and display board may be defective. The main control board can cause the same random operation, while a shorted control module is less common and should be considered only after testing the switches and control panel. Enter your Broan range vent hood model number to find the exact replacement thermostat, control board, touchpad, or other part for your specific hood.

01 - Broan Range Vent Hood Thermostat

If the temperature in the hood gets hot there may be a thermostat that will automatically turn on the vent blower until the temperature cools down. Check the owner's manual and /or the wiring diagram to see if your vent hood has this feature.

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Highly Likely

02 - Broan Range Vent Hood Control Board

The control board has relays that send power to the fan and lights. If the contacts in the relays become burnt, or the board is shorting out, they may make contact intermittently. If the fan or lights are turning off and on the control board may be bad.

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Common

03 - Broan Range Vent Hood Touchpad

When the touchpad buttons are pressed a circuit is closed sending a signal to the control board. If the button is worn it can cause the circuit to close intermittently, turning on the hood.

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Common

04 - Broan Range Vent Hood User Control and Display Board

The buttons on the user control and display board may be only intermittently activating. To determine if the control and display board is defective, try pressing each of the buttons on the control panel. If some of the buttons are not responding correctly, replace the user control and display board.

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Common

05 - Broan Range Vent Hood Main Control Board

The main control board has relays that send power to the fan and lights. If the contacts in the relays become burnt, or the board is shorting out, they may make contact intermittently. If the fan or lights are turning off and on, the main control board may be bad.

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Common

06 - Broan Range Vent Hood Control Module

The control module receives inputs from the control panel switches to turn the lights and blower on and off. If the control module shorts out, the blower or lights may go on and off randomly. Because this is not a common problem make sure the control panel and switches are tested before replacing the control module.

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Common

Frequently Asked Questions

Why does my Broan range vent hood turn on by itself?

How do I know if the Broan range vent hood thermostat is causing the problem?

Could the touchpad make my Broan range vent hood turn on by itself?

When should I replace the Broan range vent hood control board?

How do I find the correct Broan range vent hood replacement part?

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