Garage Door Photo Eye Safety in Aurora: Why This One Part Matters Most
2026-08-02 7 min read A2Z Garage Doors
Here's what most homeowners don't realize about garage door safety in Aurora: the tiny sensors on either side of your door opening might be the most important safety device in your entire garage. These photo eyes detect obstructions and trigger the auto-reverse mechanism to stop a closing door before it crushes a child, pet, or car. If they malfunction, your door becomes a potential hazard. We've found that roughly half the garage doors we service have misaligned or dirty photo eyes, and many owners have no idea the problem exists.
What the Photo Eye Actually Does
Your garage door's photo eye works as a safety net. When the door closes, an infrared beam travels between the two sensors positioned on each side of the opening, typically about 6 inches from the ground. If anything blocks that beam during descent, the door immediately reverses direction. This auto-reverse feature is federally mandated on all garage door openers manufactured after 1993, and the photo eye is what makes it function. See our guide on emergency garage door repair: what to do when your door won.
Without a working photo eye, your door won't stop if a child runs underneath while it's closing. A garage door weighs 300 to 500 pounds. The force it generates is enough to cause serious injury. That's not hyperbole. That's physics and documented safety data.
Why Photo Eyes Fail in Aurora's Climate
Colorado's dry climate and dust create unique challenges for photo eye sensors. Dust accumulation on the lens is the most common culprit we see. When particles build up on either sensor, the infrared beam gets blocked even when nothing is actually in the door's path. This causes nuisance reversals or, worse, complete photo eye failure that homeowners don't catch until something goes wrong.
Temperature swings also matter. Aurora winters drop well below freezing, and summer heat climbs into the 90s. Repeated expansion and contraction can loosen the sensor brackets, throwing the alignment off by just a fraction of an inch. That's enough to break the beam.
We also see photo eye damage from garage clutter. A rake leaning against the wall, a bicycle, or a parked car too close to the door can physically damage the sensor housing.
**Need garage door safety in Aurora today?** Call (720) 408-6434. We cover same-day service across the metro area and can test your photo eye before problems develop.
How to Check Your Photo Eyes Right Now
Walk to your garage door and look at both sides of the opening near the ground. You'll see two small boxes, usually black or dark gray, mounted on the door frame. One has a red or amber LED light; the other has a green light.
The lights tell you everything. If both lights are steady and bright, your photo eyes are working. If the lights are dim, flickering, or off, you have a problem that needs immediate attention.
Next, clean both sensors with a soft, dry cloth. Gently wipe the lens on each sensor. Then test your door again. Many photo eye issues resolve with basic cleaning.
Try the safety test too: close your door and place a broom handle across the opening at ground level. The door should hit the broom and reverse. If it doesn't reverse, or if it reverses after traveling more than a foot or two, your auto-reverse system needs professional inspection.
Related to this, you might also review our guide on garage door safety testing in Aurora for a complete monthly checklist.
When to Call a Professional
If cleaning doesn't restore steady lights, or if your auto-reverse test fails, contact us for an estimate. Misaligned photo eyes require professional tools to realign properly. Damaged sensors need replacement. Neither is a DIY fix if you want the job done right.
A working photo eye is child safety. It's pet safety. It's the difference between a minor scare and a tragedy. At Garage Door Company Aurora, we test photo eyes as part of every maintenance visit because we've seen what happens when they fail.
If your door is older than 10 years and you haven't had the photo eyes professionally inspected, that's your next step. Schedule a free quote to have one of our technicians come out and verify your system is protecting your family.
Frequently Asked Questions
How often should I clean my garage door photo eyes? Clean your photo eye sensors monthly, or more frequently if you live in a dusty area. Regular cleaning prevents alignment drift and keeps the infrared beam unobstructed. This takes five minutes and costs nothing.
Can I realign my photo eyes myself? Realignment requires precision. Small adjustment screws on the sensor bracket can shift the beam by fractions of an inch. If you're uncomfortable with small mechanical adjustments, hire a professional. Incorrect realignment defeats the safety purpose.
What does it mean when both lights are on but flickering? Flickering lights usually indicate a dirty lens or partial obstruction. Clean both sensors thoroughly. If flickering continues after cleaning, the sensor itself may be failing and needs replacement.
Do photo eyes wear out over time? Yes. Photo eye sensors have a lifespan of roughly 10 to 15 years, depending on use and climate exposure. If your door is older than 12 years and you haven't replaced the sensors, budget for replacement soon.
Why does my door reverse for no reason? Phantom reversals almost always mean photo eye misalignment or a dirty lens. Dust, spider webs, or loose sensor brackets cause the infrared beam to break intermittently. Clean and inspect both sensors first.