Garage Door · 2026-06-17

Why Your Garage Door Reverses Before It Closes (and How to Fix It)

Common reasons an automatic garage door won't stay closed, plus the safe adjustments a homeowner can make.

If your garage door starts down and then rolls right back up, the opener is doing its job: federal safety rules require automatic doors to reverse when something blocks the path. The most common culprit is the pair of photo-eye sensors mounted a few inches above the floor on each track. When their beam is broken or misaligned, the door assumes something is in the way. Start by wiping the small lenses clean with a soft cloth, then check that both sensors point directly at each other. Most have a small LED that glows steady when aligned and blinks or goes dark when they're off. A bumped bracket or a stray broom leaning nearby is often all it takes.

If the lenses are clean and aligned and the door still reverses, the close-force or travel-limit settings on the motor unit may need a small adjustment; your opener's manual shows which dials control these. Make only tiny changes at a time and test after each one.

There's an important line not to cross. If the door reverses with nothing blocking it and the sensors check out, or if it slams down hard, the problem may be in the springs, cables, or logic board. High-tension springs and cables store enough force to cause serious injury and are not a DIY repair. When the simple checks don't solve it, bring in a qualified garage-door specialist to diagnose the mechanism safely.

Relevant resource: a qualified garage-door specialist.