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Jenn Air Range vent hood turning on by itself

If your Jenn Air range vent hood turns on by itself, the thermostat is the most likely cause. Some Jenn Air range vent hoods use a thermostat to start the vent blower automatically when the hood becomes hot, then shut it off after the temperature drops. Check your owner's manual or wiring diagram to confirm whether this feature is part of your model. If the blower or lights turn on and off randomly, the range vent hood control board may have burnt relay contacts or an intermittent short. A worn touchpad can also send an unintended signal when its buttons close the circuit intermittently. Next, check the user control and display board by pressing each control button and watching for buttons that do not respond correctly. The main control board can cause the same intermittent operation, while a faulty control module is less common and should be tested after the control panel and switches. Disconnect power before testing or replacing parts, then enter your Jenn Air range vent hood model number to find the exact thermostat, control board, touchpad, or other replacement part for your specific hood.

01 - Jenn Air 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 - Jenn Air 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 - Jenn Air 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 - Jenn Air 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 - Jenn Air 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 - Jenn Air 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 Jenn Air range vent hood turning on by itself?

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

Could a Jenn Air range vent hood touchpad make the blower turn on by itself?

Should I replace the Jenn Air range vent hood control board if the fan turns on randomly?

How do I find the correct Jenn Air range vent hood part for this repair?

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