Garage Door Safety in Londonderry: What Every Homeowner Needs to Know
2026-05-17 5 min read
In our years serving Londonderry, we've seen this problem again and again: homeowners don't realize their garage door is a safety hazard until something goes wrong. A garage door weighs 300 to 500 pounds and moves on springs under tremendous tension. Without proper safety features, it can cause serious injury or death. The good news? Modern doors have built-in protections, and older ones can be upgraded. Here's what you need to know to keep your family safe.
The Hidden Dangers in Your Garage
Most people think of their garage door as a simple convenience. Press the button, it opens. Press again, it closes. But that's where complacency creates risk.
A garage door operates under constant spring tension. The springs we wrote about in our guide to garage door springs in Londonderry can snap without warning, especially in New England winters. When a spring fails, the door can drop fast. Your hand, arm, or even your head could be in the way. Children are especially vulnerable because they're naturally curious and smaller than adults, making them harder to see.
The door itself also poses crushing hazards. Most residential doors have a closing force of 40 to 50 pounds per square inch. That's enough to break bones.
Add to this the risk of entrapment. If a child crawls under a closing door or gets caught in the tracks, the door won't stop on its own. That's where safety features come in.
Photo Eye Technology and Auto-Reverse Systems
Here's the feature that changed everything: the photo eye, also called a safety sensor.
Two small boxes sit on opposite sides of your garage door opening, about 6 inches up from the ground. They send an invisible infrared beam across the opening. If anything interrupts that beam while the door is closing, the door stops and reverses immediately. This is your first line of defense against crushing injuries.
The auto-reverse feature works in tandem with the photo eye. When an obstruction is detected, the motor reverses the door's direction. The door opens back up. No crushing. No trapping.
**Need garage door safety in Londonderry today?** Call (978) 961-5968. We cover same-day service across the area and can inspect your door's safety systems right now.
Federal safety codes have required photo eyes on all new garage doors since 1993. But if your door is older, you might not have one. Londonderry Garage Doors can install photo eyes on existing doors for a reasonable cost. We'll provide a free estimate when you call.
Child Safety Features You Should Understand
Beyond sensors, there are other layers of protection.
Modern garage door openers come with a manual release cord. If the power fails, or if someone becomes trapped, this cord lets you manually open the door. It's a simple backup that saves lives. Make sure your family knows where it is and how to use it.
Many newer openers also have adjustable closing force and sensitivity settings. This lets you dial in how much pressure the door exerts as it closes. A lighter closing force means less risk of injury if someone does get pinched, though it makes the door work harder in wind.
Some doors have rollout protection too. This feature prevents the door from rolling off the tracks. It's especially useful if you have children who play near the garage or if you live in a windy area like parts of Londonderry that face gusty conditions.
How to Test Your Safety System Today
Don't just assume your safety features work. Test them.
Place a 2x4 board on the ground in the door's path, centered in the opening. Close the door with your remote. The door should hit the board, sense the obstruction, and reverse immediately. If it doesn't, your photo eye needs adjustment or repair. This is not a DIY fix. Call us for a same-day evaluation.
Also test the manual release. Pull the red cord on your opener. The door should disengage from the motor so you can raise or lower it by hand. It should move smoothly without jamming.
If either of these tests fails, your family is at risk. Old openers without reversing mechanisms are especially dangerous. We can upgrade your system or repair existing safety features. Schedule a free quote and we'll assess what your door needs.
Maintenance Keeps Safety Systems Reliable
Safety features only work if they're maintained.
Photo eye sensors collect dust and spider webs. Clean them monthly with a soft cloth. Misaligned sensors won't detect obstructions, so they won't trigger the auto-reverse. If the beam won't align, let us know. We service all opener brands.
Springs should be inspected annually. A failing spring doesn't just drop the door. It can whip and cause serious injury. Most residential springs last 7 to 9 years with regular use. We recommend professional inspection every 12 months, especially before winter. Ice and cold make failures more likely. If you haven't had your springs checked lately, read our detailed breakdown of garage door spring failure in Londonderry winters and reach out.
Your Next Step
Garage door safety isn't optional. It's essential.
Whether your door is brand new or 20 years old, we can evaluate its safety status and recommend upgrades or repairs. Many families in Londonderry trust us because we're direct about what's needed and what's nice to have. We won't upsell you.
Call (978) 961-5968 today or contact us to schedule a free safety inspection. We'll test your photo eyes, check your springs, and review your opener's settings. Same-day appointments available.
Frequently Asked Questions
What is a photo eye on a garage door? A photo eye is a safety sensor that sends an infrared beam across your garage door opening. If the beam is blocked while the door closes, the opener stops and reverses. It's required by law on all new garage door openers and prevents crushing injuries.
How often should I test my garage door's safety features? Test your auto-reverse feature monthly by placing a board in the door's path and closing it remotely. The door should stop and reverse within two seconds. Also test your manual release cord quarterly to ensure it disengages smoothly.
Can I install a photo eye on an old garage door opener? Yes. Aftermarket photo eye kits are available for most older openers. Installation takes about an hour. We recommend this upgrade for any opener without sensors, especially if children live in your home.
Why did my garage door stop reversing? The photo eye sensors are likely misaligned or covered with dust. Clean both sensor lenses with a soft cloth and check that they face each other directly. If the door still won't reverse, the sensor or opener needs professional service.
What's the cost to upgrade my garage door safety system? Safety upgrades range from $150 to $400 depending on what's needed. Call us for a free estimate with no obligation.