November 1, 2015

How to replace a downdraft vent up/down switch

By Lyle Weischwill
How to replace a downdraft vent up/down switch

This DIY repair guide explains how to replace the up/down switch on a downdraft vent. The up/down switch, also called a position switch, activates the gear motor to raise and lower the vent when you push the switch button. If the up/down switch won't start the gear motor, replace with switch with the manufacturer-approved replacement part.

Use these steps to replace the up/down switch in Kenmore and Broan downdraft vents.

Quick links
Tools required
Work gloves
Phillips screwdriver
Wire cutter
Repair difficulty
Time required
15 minutes or less
Repair difficulty
Time required
15 minutes or less
How to replace a downdraft vent up/down activating switch repair guide video.

Replacing a downdraft vent up/down activating switch video.

Instructions

  1. 01.

    Raise the air vent

    Push the up/down button to raise the vent.

    If the air vent won't rise, pull it up manually and prop up the vent with a block of wood.

  2. 02.

    Shut off the electricity

    Unplug the power cord from the wall outlet.

  3. 03.

    Remove the switch cover

    Remove the mounting screws and pull the switch cover off.

    Remove the switch cover screws.

    Remove the switch cover screws.

  4. 04.

    Pull out the switch bracket

    Remove the screws from the switch bracket.

    Slide the switch bracket down and then pull the bracket out.

    Remove the switch bracket screws.

    Remove the switch bracket screws.

    Slide the switch bracket out.

    Slide the switch bracket out.

  5. 05.

    Remove the speed control switch

    Pull the knob off the speed control switch stem.

    Remove the speed control switch mounting nut.

    Pull the speed control switch out of the switch bracket.

    Pull off the control knob.

    Pull off the control knob.

    Remove the fan switch mounting nut.

    Remove the fan switch mounting nut.

    Pull out the fan control switch.

    Pull out the fan control switch.

  6. 06.

    Remove the up/down switch

    Disconnect the up/down switch wires.

    Cut off the wire tie to release the up/down switch and speed control switch wires from the switch bracket.

    Remove the up/down switch and switch bracket.

    The new up/down switch includes a new switch bracket.

    Disconnect the up/down switch wires.

    Disconnect the up/down switch wires.

    Cut the wire tie that holds the switch wires.

    Cut the wire tie that holds the switch wires.

    Remove the switch and bracket assembly.

    Remove the switch and bracket assembly.

  7. 07.

    Install the new up/down switch

    Secure the speed control and up/down switch wires to the new switch bracket using a wire tie.

    Connect the up/down switch wires to the up/down switch.

    Connect the up/down switch wires.

    Connect the up/down switch wires.

  8. 08.

    Reinstall the speed control switch

    Reinstall the speed switch on the switch bracket and secure it using the mounting nut.

    Reinstall the speed control knob on the stem of the speed control switch.

    Reinstall the fan control switch.

    Reinstall the fan control switch.

    Reinstall the fan control knob.

    Reinstall the fan control knob.

  9. 09.

    Install the switch bracket

    Slide the switch bracket into the vent and reinstall the bracket screws, leaving the screws loose.

    Adjust the switch bracket so that the activation switch lightly touches the membrane pad and then tighten the bracket screws firmly.

    Tip: Mounting the switch bracket up too high will keep the switch depressed and the vent will raise and lower continuously when power is restored.
    Warning: Don't pinch any switch wires when installing the switch bracket.
    Install the switch bracket.

    Install the switch bracket.

  10. 10.

    Reinstall the switch cover

    Reinstall the switch cover and secure it using the mounting screws.

    Reinstall the fan control switch cover.

    Reinstall the fan control switch cover.

  11. 11.

    Restore power

    Reconnect the power cord.

Warning: Undertaking repairs or maintenance to appliances or power equipment can be hazardous. Should you choose to undertake repairs or maintenance, you are assuming the risk of injury to your person or property. In an effort to reduce the risk, use the proper tools and safety equipment noted in the applicable guide and follow all instructions. Do not proceed until you are confident that you understand all of the steps and are capable of completing the repair. Some repairs or maintenance, however, should only be performed by a qualified technician.

Symptoms common to all downdraft ventilation systems

Choose a symptom to see related downdraft vent repairs.

Main causes: lack of electrical power, up/down activation switch failure, bad vent gear motor
Main causes: clogged grease filters, air duct problems, fan motor failure, broken blower wheel
Main causes: problems with the vent limit switches, up/down activation switch failure
Main causes: fan control switch failure, bad blower fan motor, broken blower wheel, wiring failure
Main causes: electrical power failure, up/down activation switch problems, vent gear motor failure

Repair guides common to all downdraft ventilation systems

These step-by-step repair guides will help you safely fix what’s broken on your downdraft vent.

How to replace a downdraft vent up/down button pad

The up/down button pad located on top of the air vent engages the activating switch when pushed to raise the air vent. Replace the up/down button pad if damaged.

Repair difficulty
Time required
 15 minutes or less
November 1, 2015
By Lyle Weischwill
How to replace a downdraft vent up/down switch

The up/down switch starts the gear motor to raise and lower the air vent. Replace the up/down switch if defective.

Repair difficulty
Time required
 15 minutes or less
November 1, 2015
By Lyle Weischwill
How to replace a downdraft vent blower motor

The blower motor spins the fan blade that removes smoke and steam from the cooktop area. Replace the blower motor if it doesn't run when activated.

Repair difficulty
Time required
 30 minutes or less

Articles and videos common to all downdraft ventilation systems

Use the advice and tips in these articles to get the most out of your downdraft vent.

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