Why Your Garage Door Reverses Before Closing
If your garage door reverses right before it closes, the safety sensors are almost always the cause — they are misaligned, dirty, or blocked, so the opener senses something in the way and reverses. A wrong close-limit setting is the second most common reason.
The number-one cause: safety sensors
Two photo-eye sensors sit near the floor on each track, and their beam must be clear and aligned for the door to close. If one is bumped out of line, dusty, or blocked, the opener does its job and reverses to avoid crushing whatever it thinks is there. Both sensor indicator lights should glow steadily when aligned.
Other reasons a door reverses
- Dirty or cobwebbed sensor lenses
- Misaligned photo-eyes pointing away from each other
- An incorrect close-limit setting on the opener
- An obstruction or debris on the floor in the door’s path
- Worn rollers or a binding track adding resistance
How to fix it — and when to call us
Start simple: wipe both lenses clean and check that the alignment lights are steady. If the door still reverses, the close-limit, wiring, or track may need adjustment — quick work for a technician who diagnoses this daily.
Foremost is a family-owned garage door company serving Plainfield and the Southland since 1941. Need safety sensor repair? Call (708) 708-9525 — same-day, 7 days a week, 7 AM to 9 PM. Learn more about our safety sensor repair or our garage door service in Plainfield.
Frequently asked questions
Why does my door close halfway then go back up?
That pattern usually points to a close-limit setting or an obstruction/binding in the track, rather than the sensors. A technician can reset the limits and check the track.
How do I realign garage door sensors?
Gently adjust each photo-eye until both indicator lights are steady, and wipe the lenses. If the lights will not stay solid, the wiring or a sensor may need replacing.
Is it safe to disable the sensors?
No. They stop the door on a person, pet, or object and are a required safety feature. Repair them rather than bypass them.
Written by Adam Wright, co-owner of Foremost Garage Door Repair in Mokena, IL. Published October 3, 2026.