The part(s) or condition(s) listed below for the symptom Range vent hood downdraft vent won't go up are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.
To determine if the rocker switch is defective, use a multimeter to test the switch for continuity. If the rocker switch does not have continuity, replace it.
Check the drive motor to determine if it is running. If the drive motor still runs, try turning the motor by hand. If the motor does not turn freely, this indicates that the drive motor is worn out and should be replaced. If the drive motor does not run, use a multimeter to test it for continuity. If the motor does not have continuity, replace it.