Auto-Reverse Sensors: Protecting Your Family
2023-12-28 7 min read Sarah Chen
Since 1993, federal law has required all garage door openers to include auto-reverse safety features. These sensors have prevented countless injuries and saved lives. Understanding how they work.and ensuring they're functioning properly.is essential for every homeowner.
How Auto-Reverse Sensors Work
Modern garage doors include two types of auto-reverse mechanisms:
Photo-Eye Sensors
Located 4-6 inches above the ground on either side of the door, these sensors project an invisible infrared beam across the door opening. When anything breaks this beam while the door is closing, the door immediately reverses direction.
Pressure Sensors
Built into the door or opener mechanism, these sensors detect resistance when the door contacts an object. If the door meets unexpected resistance while closing, it reverses direction.
Why Sensors Fail
Despite their importance, sensors can malfunction for several reasons:
Misalignment: Even slight movement can cause sensors to lose their connection. This is often caused by vibration, accidental bumping, or settling of the garage structure.
Dirt and Debris: Dust, cobwebs, or moisture on the sensor lenses can block the infrared beam.
Wiring Issues: Damaged wires from rodents, moisture, or age can cause intermittent failures.
Sun Interference: Direct sunlight hitting a sensor can override the infrared beam, causing erratic behavior.
Age and Wear: Like all electronic components, sensors degrade over time.
Testing Your Sensors
Test your auto-reverse sensors monthly:
Photo-Eye Test: 1. Place a cardboard box or similar object in the door's path 2. Activate the door to close 3. The door should reverse immediately upon approaching the obstruction 4. If it doesn't reverse, DON'T use the door until repaired
Pressure Test: 1. Place a 2x4 flat on the ground beneath the door 2. Close the door 3. When the door contacts the wood, it should reverse immediately 4. If it continues pushing down, adjust the close force or call for service
Maintenance Tips
Keep your sensors working reliably:
- Clean sensor lenses monthly with a soft, dry cloth, Check alignment by observing the indicator lights (usually green when aligned) - Ensure wiring is secure and undamaged, Keep the sensor area clear of debris and obstructions, Test sensors monthly using the procedures above
When to Call Professionals
Contact Garage Door Union immediately if: - Sensors fail testing, Indicator lights don't illuminate or blink irregularly, You notice damaged wiring or sensors, The door behaves erratically
Your family's safety isn't worth risking. Call (360) 997-0088 for prompt sensor inspection and repair.