The part(s) or condition(s) listed below for the symptom Range vent hood downdraft vent won't stay 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 switch is defective, use a multimeter to test the switch for continuity. If the rocker switch shows continuity at every setting, replace it.
To determine if the selector switch is defective, consult your vent hood’s wiring diagram and use a multimeter to test the switch for continuity. If the selector switch does not have continuity, replace it.