Garage Door Safety Sensors: What They Do and How They Work

Safety sensors are a mandatory safety feature on all modern garage door openers, required by federal law since 1993. These photo-eye sensors create an invisible infrared beam across the door opening, typically mounted about six inches above the floor on each side of the door.

If anything breaks the beam while the door is closing whether it is a child, pet, vehicle, or object the system automatically reverses direction and returns to the open position. This critical safety mechanism prevents entrapment and serious injury. Proper alignment is essential for sensor function; even a slight misalignment can cause the door to refuse to close or reverse unexpectedly.

Common issues include misalignment from accidental bumps, dirty sensor lenses that block the infrared beam, wiring problems, and electrical interference from nearby devices. Crown Lift provides professional sensor calibration, repair, and replacement services to ensure your garage door safety system operates reliably.