June 1, 2016

How to replace a garage door opener logic board

By Lyle Weischwill
How to replace a garage door opener logic board

This DIY repair guide explains how to replace the logic board in a garage door opener. The logic board is the "brains" of the garage door opener. It contains the radio frequency (RF) receiver for the remote controls and other control components. Because other problems share the same symptoms, a service technician should confirm the logic board is the problem, or you can try our troubleshooting videos Garage Door Opener Wall Control Troubleshooting Video and Garage Door Opener Remotes Won't Work Video. If the logic board no longer works, replace it with the manufacturer-approved replacement part.

Use these basic steps to replace the logic board in Craftsman, LiftMaster and Chamberlain garage door openers.

Quick links
Tools required
Step ladder
Work table
Phillips screwdriver
Nut driver set
Wrench set
Needle-nose pliers
Work gloves
Repair difficulty
Time required
60 minutes or less
Repair difficulty
Time required
60 minutes or less
Replacing the logic board on a garage door opener

This video explains how to replace the logic board on a garage door opener.

Instructions

  1. 01.

    Disconnect power

    Use a step ladder to access the garage door opener’s power cord and motor unit. Unplug the garage door opener.

    Unplug the garage door opener.

    Unplug the garage door opener.

  2. 02.

    Take the garage door opener down

    Position a work table near the area under your motor unit to hold the garage door opener during the repair.

    Pull the emergency release rope to release the trolley from the garage door.

    Shut the garage door if it's not already closed.

    Remove the fastener ring from the straight door arm connected to the outer trolley.

    Pull out the clevis pin while supporting the straight arm to disconnect the garage door from the outer trolley. Use a helper if necessary.

    Lower the straight and curved arms down and rest them against the garage door.

    Open the light cover to access the wall control and safety sensor wires connected to the motor unit.

    Take a digital photo of the wall control and safety sensor wires connected to the motor unit. You'll refer to the photo later when reconnecting the wires.

    Disconnect the wall control and safety sensor wires from the motor unit.

    Close the light cover.

    Remove the nuts, bolts, and lock washers that secure the motor unit to the ceiling bracket. Support the motor unit with one hand as you remove the last bolt from the ceiling bracket.

    Carefully lower the motor unit down and rest it securely on top of the step ladder.

    Climb down the step ladder, lower the motor unit down and rest it on your work table.

    Move your step ladder by the garage door so you can remove the rail from the header bracket.

    Remove the fastener ring from the header bracket clevis pin.

    Pull the clevis pin out of the rail and header bracket while supporting the rail with one hand.

    Lower the rail and rest it on a rung of the step ladder so the rail is level with the motor unit on your work table.

    Tip: To avoid scratching a decorative garage door, remove the nuts, bolts and washers from the curved arm and carefully rest the curved arm against the door when disconnecting the garage door from the outer trolley.
    Disconnect the door arm from the trolley.

    Disconnect the door arm from the trolley.

  3. 03.

    Remove the logic board

    Remove the light cover and light bulb from the control panel.

    Remove the screws from the control panel and pull it out slightly to access the wire connections.

    Disconnect the wires from the logic board.

    Remove the logic board mounting screws.

    Pull the logic board off the control panel.

    Release the control panel.

    Release the control panel.

  4. 04.

    Install the new logic board

    Thread the antenna wire through the control panel hole.

    Position the new logic board on the control panel.

    Install the mounting screws in the new logic board.

    Push the antenna wire through the hole on the corner of the control panel.

    Connect the wires to the new logic board.

    Reinstall the control panel on the motor unit and secure it with the mounting screws.

    Reinstall the light bulb and light cover.

    Install the new logic board.

    Install the new logic board.

  5. 05.

    Reinstall the garage door opener

    Reconnect the rail end to the header bracket using the clevis pin and fastener ring.

    Position your step ladder under the motor unit ceiling bracket and carefully set the motor unit on top of the step ladder.

    Climb the step ladder and reinstall the motor unit to the ceiling bracket using the nuts, bolts and lock washers.

    Open the light cover to access the wall control and safety sensor terminals on the motor unit.

    Using your digital photo for reference, reconnect the wall control and safety sensor wires to the motor unit.

    Close the light cover.

    Reconnect the straight door arm to the outer trolley using the clevis pin and fastener ring.

    Re-engage the trolley.

    Tip: Reconnect the curved door arm to the straight door arm using the bolts, lock washers and nut if you disconnected the curved arm from the straight arm when freeing the garage door from the outer trolley.
    Reconnect the rail to the header bracket.

    Reconnect the rail to the header bracket.

  6. 06.

    Reconnect electrical power

    Plug in the garage door opener.

Warning: Undertaking repairs to appliances can be hazardous. Use the proper tools and safety equipment noted in the 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 should only be performed by a qualified technician.

Symptoms common to all garage door openers

Choose a symptom to see related garage door opener repairs.

Main causes: loose fasteners, broken brackets, need preventive maintenance, worn drive gears, loose or worn belt, loose chain
Main causes: safety sensor beams blocked, safety sensors not aligned, downforce setting needs adjustment, damaged garage door tracks
Things to do: check garage door travel, tighten brackets and fasteners, test safety sensors, check travel limits and force limits
Main causes: faulty logic control board, bad RPM sensor, broken gears in the drive system, bad drive motor
Main causes: garage door opener misaligned, travel limits need adjustment, bad travel limit switches, faulty logic control board
Main causes: neighbor's remote programmed at the same time as yours, faulty wall control wiring, bad wall control unit
Main causes: radio interference, weak remote batteries, sunlight interference with safety sensor beams, safety sensors need adjustment
Main causes: garage door locked, damaged garage door tracks, up-force setting needs adjustment, RPM sensor failure, bad drive motor

Repair guides common to all garage door openers

These step-by-step repair guides will help you safely fix what’s broken on your garage door opener.

June 20, 2016
By Lyle Weischwill
How to replace a garage door opener battery

The garage door won't move during a power outage if the battery is dead. Here’s how to replace it.

Repair difficulty
Time required
 15 minutes or less
January 6, 2016
By Lyle Weischwill
How to replace a garage door opener drive belt

A damaged or broken belt on your garage door opener could be the reason it won’t move the door. Here’s how to fix it.

Repair difficulty
Time required
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How to replace a chain-drive garage door opener drive and worm gears

If your garage door won’t move, the drive and worm gears could be broken. This guide will help you replace the gears.

Repair difficulty
Time required
 60 minutes or less

Articles and videos common to all garage door openers

Use the advice and tips in these articles and videos to get the most out of your garage door opener.

May 11, 2018

Garage door won't move: motor and travel troubleshooting video

By Sears PartsDirect staff

Diagnose and repair problems if your garage door won’t move and the motor unit indicator light flashes 5 times.

October 26, 2016

How to repair broken or damaged wires video

By Sears PartsDirect staff

Learn how to repair broken, frayed or damaged wires in your appliances.

March 4, 2015

How to maintain a garage door opener

By Sears PartsDirect staff

Learn what maintenance a garage door opener needs, and when to perform the maintenance.