What you Need to Know About Garage Door Safety Sensors in Austin TX
Those two small "eyes" near the floor of your garage door are the safety system that stops the door from closing on a car, pet, or person. Federal law has required them on residential openers since 1993, and your door won't close if they're blocked, misaligned, or failed — by design. Here's what they do, how to tell when they're the problem, and when to realign vs. replace.
What the safety sensors actually do
One sensor sends an invisible infrared beam across the opening; the other receives it. If anything breaks the beam while the door is closing, the door immediately reverses. It's the reason a closing door stops when a kid or a backing car crosses underneath — and it's a non-negotiable safety feature.
Signs your sensors are the problem
- The door starts to close, then reverses back up.
- One or both sensor LEDs are blinking or off (steady = good).
- The opener clicks or the lights flash but the door won't close.
- It only happens at certain times of day — bright sun can wash out a misaimed sensor.
Realign or replace?
Most sensor issues are realignment or cleaning — dust, pollen, a bumped bracket, or a blocked beam. That's a quick fix. Replacement is needed when a sensor is physically damaged, a wire is chewed or corroded, or the unit has failed and won't hold a steady light no matter how you aim it. Sensor replacement with installation is an inexpensive repair, and it's worth doing right because it's a safety device.
Never bypass them
It's tempting to "jump" the sensors to force a stubborn door closed — don't. It disables the only thing stopping the door on a person or pet, and it's not code-compliant. If your sensors keep failing, fix or replace them rather than defeating them.
Garage door safety sensors — FAQs
Why won't my garage door close?
Most often the safety sensors are blocked, dirty, or misaligned — the door reverses on purpose. Clean the lenses and aim them until both LEDs glow steady.
Are garage door safety sensors required?
Yes — they've been federally required on residential garage door openers since 1993, and they should never be bypassed.
How much does sensor replacement cost?
It's an inexpensive repair — a $69 service call (credited if you book) plus the sensor and install. We confirm the price on site.
My sensors work in the morning but not in bright sun.
Direct sun can wash out a slightly misaimed sensor. Re-aiming so the beam is dead-on usually fixes it; a sun shield can help in extreme cases.
Prefer to spread the cost? We offer 0% APR financing for qualified buyers (660+ credit) through Hearth — checking your rate won't affect your credit. See options →
Door won't close or sensors acting up? Call Edge Garage Doors at (737) 347-1246 or request a quote.