January 15, 2026 6 min read
Your garage door is the largest moving object in your home, weighing between 150 and 400 pounds depending on the material and size. Without proper safety features, a closing garage door could cause serious injury to people, pets, or property. That's why modern garage door openers are required to include safety reversal systems, and why regular testing of these systems is essential for every homeowner.
Modern garage door openers include two primary safety mechanisms: photo-eye sensors and mechanical force settings. Both systems work together to prevent the door from closing on objects or people in its path.
Installed about six inches above the floor on either side of the garage door opening, photo-eye sensors create an invisible beam across the door's path. When anything breaks this beam while the door is closing, the door immediately reverses direction and opens fully. These sensors are required on all garage door openers manufactured after 1993.
The opener's force settings determine how much resistance the door will encounter before automatically reversing. If the door meets an obstruction.like a person, pet, or object.the increased resistance triggers an automatic reversal.
The Consumer Product Safety Commission recommends testing your garage door safety features monthly. Here's how to perform these essential tests:
1. Open your garage door fully 2. Place a tall object (like a cardboard box or trash can) in the door's path, breaking the sensor beam 3. Press the remote or wall button to close the door 4. The door should immediately reverse when the sensors detect the obstruction
If the door doesn't reverse, check that the sensors are properly aligned.both sensor lights should be steady (not blinking). Clean the sensor lenses with a soft cloth, as dust and debris can interfere with their operation.
1. Open your garage door fully 2. Place a 2x4 piece of lumber flat on the ground in the center of the door's path 3. Press the button to close the door 4. When the door touches the wood, it should immediately reverse and open
If the door doesn't reverse on contact with the 2x4, your opener's force settings need adjustment. This is a job best left to professionals, as improper adjustment can create safety hazards.
While monthly testing helps you identify problems early, some issues require expert diagnosis and repair:
- Sensors blinking continuously: This typically indicates alignment problems or electrical issues - Door reverses for no apparent reason: Could be sensor interference, sunlight issues, or wiring problems - Door doesn't reverse on obstruction: Dangerous condition requiring immediate professional service - Unusual sounds during operation: May indicate mechanical problems affecting safety performance
Regular maintenance extends the life of your safety systems and ensures they work when needed:
- Clean sensor lenses monthly with a soft, dry cloth - Check sensor alignment by looking for steady (not blinking) lights on both sensors - Test batteries in remotes and keypads regularly - Schedule annual professional maintenance to address issues you might miss
While DIY monthly testing is important, annual professional inspection provides a deeper assessment of your garage door's safety systems. Our technicians use specialized equipment to verify sensor calibration, test force settings precisely, and identify worn components before they fail.
At Walterville Garage Doors, safety is our top priority. If your monthly testing reveals any issues, or if it's been more than a year since your last professional inspection, give us a call at 1-541-532-3842. We'll ensure your garage door operates safely for years to come.
*Remember: A few minutes of monthly testing could prevent a serious injury. Make safety reversal testing part of your regular home maintenance routine.*