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Safety Sensor Troubleshooting

Garage Door Sensor Problems

Garage door safety sensors help prevent the door from closing when something is in the opening. When sensors are blocked, dirty, misaligned or malfunctioning, the opener may refuse to close normally.

Residential garage door illustration

Safe sensor checks

  1. Clear objects from between the sensors.
  2. Gently clean the lenses.
  3. Look for obvious movement or misalignment.
  4. Check whether indicator lights are steady, off or blinking.
  5. Inspect visible low-voltage wiring for obvious damage.

If sensors look fine

The issue may involve opener settings, wiring, controls or mechanical resistance. See opener repair.

Do not bypass the safety system

If the door will not close normally and the cause is unclear, have the system checked rather than defeating the safety feature.

Call for help

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