Garage Door Won’t Close
If your garage door won’t close, the issue is often related to sensors, obstructions, travel limits, or opener settings. This guide covers the most common causes and safe troubleshooting steps.
Common Reasons the Door Won’t Close
- Safety sensors are blocked or misaligned
- Sensor wiring is loose or damaged
- Sunlight interference on the receiving sensor
- Obstruction in the door’s path
- Travel limits set incorrectly
- Opener force settings too low
- Remote or wall control malfunction
Quick Checks You Can Do
- Look for flashing lights on the opener or wall control
- Ensure nothing is blocking the sensor beam
- Clean sensor lenses with a soft cloth
- Check that both sensor indicator lights are solid
- Remove debris from the tracks and door path
Sensor Alignment Problems
- Sensors must face each other directly
- Vibration or bumps can knock them out of alignment
- One blinking light usually indicates misalignment
- Sunlight hitting the receiving sensor can cause false triggers
Opener-Related Issues
- Flashing lights: Often a sensor or obstruction issue
- Door reverses immediately: Force or travel limits may be incorrect
- Clicking but no movement: Opener detects a safety fault
- Humming motor: Door may be stuck or too heavy
Door Hardware Problems
- Rollers stuck or binding in the tracks
- Bent tracks preventing smooth movement
- Debris or ice blocking the bottom seal
- Loose hinges or brackets causing uneven travel
Safe Troubleshooting Steps
- Clear all objects from the door’s path
- Realign sensors until both lights are steady
- Wipe dirt or moisture from sensor lenses
- Try closing the door while holding the wall button (test only)
- Reset the opener by unplugging it for 10 seconds
If the door closes only when holding the wall button, the sensors are the issue.
When to Stop Troubleshooting
- Door reverses violently or unpredictably
- Springs or cables appear damaged
- Tracks are bent or rollers are off-track
- Opener strains, hums, or overheats
When to Call a Professional
- Persistent sensor alignment issues
- Damaged wiring or electrical problems
- Door is off-track or binding
- Travel or force settings need adjustment
- Springs or cables show signs of wear
A garage door that won’t close is often caused by sensor or alignment issues, but mechanical problems can also be involved. With safe troubleshooting and timely repairs, you can restore smooth, reliable operation.