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Garage Door Sensor Problems: Causes and Troubleshooting

FIX SOLUTION GARAGE DOORPublished September 6, 2026Updated September 6, 20265 min read
Photoelectric garage door safety sensor near the bottom of a garage door opening in Miami, Florida

Garage door safety sensors are designed to help prevent the door from closing when an obstruction is detected.

When the sensor system has a problem, a door may refuse to close normally.

Common sensor problems

Possible causes include:

  • Sensor misalignment
  • Dirty lenses
  • Damaged wiring
  • Loose mounting
  • Physical damage
  • Moisture
  • Electrical or opener-related problems

Safe homeowner checks

A homeowner can visually check whether an object is blocking the opening and whether the sensor lenses appear dirty or obviously misaligned.

When sensors are not the real problem

A garage door that will not close may also have a track, roller, opener, or mechanical problem.

Diagnosis should consider the entire system.

See our garage door won't close guide and the opener repair guide, or the opener repair service page for Miami service.

Sensor and opener inspection in Miami

FIX SOLUTION GARAGE DOOR provides free estimates for garage door and opener problems.

Professional garage door service for Miami and surrounding service areas in Miami-Dade County.

Schedule a Free Estimate

A technician can inspect the garage door, explain the problem and provide the price before any repair work begins.

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A technician can inspect the garage door, explain the problem and provide the price before any repair work begins. The estimate is free.

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