Garage Door Opener: Opens and closes by itself

When your garage door opens or closes when you haven't triggered the remote, one possible cause is that a neighbor's remote was programmed at the same time as yours. Erase all codes in your remote and then reprogram it. If that doesn't fix the problem, check the wiring between the motor unit and the wall control. Faulty wires can short together and trigger the motor unit to open or close the door. A defective wall control can cause the same problem. Our garage door opener wall control troubleshooting video will help you figure out the problem. Replace the wall unit if you find it has failed.

garage door opener

These repairs may help solve your garage door opener problem

Replace the garage door opener wall control

Replace the garage door opener wall control

A defective wall control won't move the garage door when you press the button. A faulty wall control can open or close the garage door on its own. Replace the wall control if it does't work properly.

How to replace a garage door opener wall control

If your garage door won't move when you push the button on the garage door opener wall control, the wall control might be broken. This repair guide and video show how to replace a garage door opener wall control in 4 quick steps.

Repair difficulty
Time required
 15 minutes or less
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Program the vehicle's garage door opener remote

Program the vehicle's garage door opener remote

Special programming is sometimes needed to link a vehicle's built-in remote control to the garage door opener. First follow the steps in the vehicle's owner's manual for clearing any existing codes and programming, Software updates for the system are occasionally required to correct incompatibility. Contact the manufacturer of the garage door opener for help with resolving this type of problem.

Repair or replace external garage door opener wiring

Repair or replace external garage door opener wiring

External wiring connects the wall-mounted door control and the safety sensor to the motor unit of the garage door opener. That wiring can become damaged or disconnected. Check that wires are securely attached to the sensor's photoelectric eyes (each eye has 2 wires) and the wall unit. If any wire is cut, strip insulation from the end of the wire and reattach it. Check that wires are still attached to the terminals on the back of the motor unit. Replace or repair any frayed, pinched, or exposed wires.

Symptoms common to all garage door openers

Choose a symptom to see related garage door opener repairs.

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

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.

How to replace a garage door opener safety sensor

If your remotes don’t work and the lights on the motor unit blink when you press a remote, the safety sensors may have failed. This guide will help you replace them.

Repair difficulty
Time required
 15 minutes or less
How to replace a chain-drive garage door opener gear and sprocket assembly

Learn how to replace the gear and sprocket assembly on your garage door opener if the drive motor runs but the door won't move.

Repair difficulty
Time required
 60 minutes or less
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.

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