8 min read
Your garage door is likely the largest moving object in your home, weighing anywhere from 150 to over 400 pounds. The safety reversal system is specifically designed to prevent this heavy door from causing injury or damage. Understanding how to test this system isn't just recommended.it's essential for every homeowner.
Modern garage doors are required by federal law (since 1993) to include two types of safety features: the mechanical auto-reverse and the photoelectric sensors. These systems work together to detect obstructions and automatically reverse the door's direction.
The mechanical auto-reverse system relies on resistance detection. When the closing door encounters an object.whether it's a bicycle, a toy, or unfortunately sometimes a child or pet.the opener's motor senses the increased resistance and immediately reverses direction.
Photoelectric sensors, commonly called "safety eyes," create an invisible beam across the garage door opening approximately six inches above the ground. When this beam is broken while the door is closing, the system immediately reverses the door.
We recommend performing safety tests on your garage door at least once per month. Here's the proper testing procedure:
Testing the Mechanical Auto-Reverse: 1. Place a 2x4 piece of wood flat on the ground in the center of the door's path 2. Activate the door to close using your remote or wall button 3. When the door contacts the wood, it should immediately reverse 4. If the door doesn't reverse, or if it reverses but only after significant pressure, the system needs adjustment
Testing the Photoelectric Sensors: 1. Start with the door in the fully open position 2. Activate the door to close 3. Wave a broom handle or similar object through the sensor beam path 4. The door should immediately reverse 5. Check that both sensor lights are illuminated (typically one is green, one is amber)
If your safety reversal system fails these tests, there are several potential causes:
Misaligned Sensors: The most common issue is sensors that have been bumped or shifted out of alignment. They need to point directly at each other. Many sensors have adjustment screws that allow for fine-tuning.
Dirty Sensor Lenses: Dust, cobwebs, and debris can block the sensor beam. A simple cleaning with a soft cloth often resolves intermittent issues.
Sunlight Interference: Direct sunlight can sometimes interfere with sensor operation. If problems only occur at certain times of day, consider adding a shade or repositioning sensors.
Worn Springs or Cables: If the mechanical auto-reverse isn't working properly, the issue might be with the door's balance rather than the opener. A door with worn springs requires more force to operate, which can affect sensitivity settings.
While basic testing is something every homeowner should do, certain situations require professional attention:
- The door doesn't reverse at all during testing, Sensors appear to be working but don't trigger reversal, The door reverses randomly without obstruction, You hear grinding or unusual noises during operation, The door operates inconsistently
At Tygh Valley Garage Doors, we include a comprehensive safety inspection with every service call. Our factory-trained technicians can adjust sensitivity settings, replace worn components, and ensure your system meets current safety standards.
The few minutes you spend testing your garage door each month could prevent a serious accident. Children and pets are particularly at risk because they're often at the height where the door can make contact without triggering upper obstruction sensors.
Teach your children that the garage door is not a toy. The remote controls should be kept out of reach, and children should never try to race under a closing door. These simple precautions, combined with a properly functioning safety system, will help keep your family safe.
If you have any concerns about your garage door's safety systems, don't hesitate to call us at (541) 229-7832. Your family's safety is our top priority, and we're here to help 24/7.