Why Your Garage Door Opens but Won’t Close

A garage door that opens normally but refuses to close can be frustrating—and it’s often caused by a simple issue rather than a bad garage door opener.

1. Dirty Safety Sensors

Modern garage doors use two photo-eye sensors near the floor. If they’re blocked or dirty, the opener assumes something is in the doorway and won’t close.

Try this:

• Wipe both sensor lenses with a soft cloth.
• Remove leaves, dirt, or spider webs.
• Make sure nothing is blocking the beam.

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1. Misaligned Sensors

If one sensor gets bumped, the invisible beam is interrupted.

Signs:

• Door starts closing, then reverses.
• Sensor lights blink or go out.

Adjust both sensors until their indicator lights stay solid.

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1. Broken Sensor Wiring

Look for:

• Damaged wires
• Loose connections
• Rodent damage
• Staples pinching the cable

Repair or replace damaged wiring.

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1. Travel Limit Settings

The opener may think the floor is higher than it actually is.

If the travel limits are incorrect, the door can reverse before fully closing.

Consult your opener’s manual to adjust the close limit.

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1. Obstruction in the Door Tracks

Check for:

• Small rocks
• Bent tracks
• Loose hardware
• Debris

Even a small obstruction can trigger the safety system.

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1. Remote Works but Wall Button Doesn’t

Possible causes include:

• Faulty wall control
• Loose wiring
• Damaged control board

Test both controls to narrow down the problem.

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1. Worn Rollers or Hinges

If the door binds while moving, the opener may stop to prevent damage.

Inspect for:

• Flat spots on rollers
• Bent hinges
• Damaged tracks

Lubricate moving parts with garage door lubricant.

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Safety Warning

Never attempt to repair or remove garage door torsion springs yourself. They are under extreme tension and can cause serious injury. If you suspect a broken spring, contact a qualified garage door technician.

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When to Replace the Opener

Consider replacing the opener if:

• It’s over 15 years old.
• The motor hums but won’t operate the door.
• Replacement parts are no longer available.
• The logic board has failed.

New openers often include quieter belt drives, battery backup, smartphone control, and improved safety features.

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Need More Help?

If your garage door still won’t close after checking the sensors and tracks, Repair Scout can help diagnose the problem and guide you through the next repair steps based on your garage door opener and symptoms.