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KitchenAid Range vent hood turning on by itself

If your KitchenAid range vent hood is turning on by itself, the thermostat is the most likely cause. Some vent hoods automatically start the blower when heat inside the hood reaches a set temperature, then shut it off after the hood cools. Check your owner's manual and wiring diagram to confirm whether your model has this feature. If the blower or lights turn on and off randomly, a failing control board may have burnt relay contacts or an internal short. A worn touchpad can also close its circuit intermittently and send an unwanted signal to the control board. Next, test the user control and display board by pressing each control button. Buttons that do not respond correctly can point to a defective board. The main control board can cause the same intermittent operation, while the control module is less common and should be tested only after the controls and switches check out. Before ordering a KitchenAid range vent hood thermostat, control board, touchpad, or user control and display board, enter your model number to find the exact replacement part for your specific vent hood.

01 - KitchenAid 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 - KitchenAid 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 - KitchenAid 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 - KitchenAid 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 - KitchenAid 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 - KitchenAid 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 is my KitchenAid range hood turning on by itself?

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

Can a KitchenAid range hood touchpad make the blower turn on by itself?

Should I replace the KitchenAid range hood control board when the fan turns on randomly?

How do I find the correct replacement part for my KitchenAid range hood?

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