Garage door reverses or won’t close: the checks to do first

What you’re seeing and hearing

• The door starts down and reverses, comes down and goes back up without touching anything, or won’t move down at all. Source: Why won’t my garage door close?
• The small LED on one of the two sensors near the floor is blinking or dark. A solid light means that sensor is aligned and its beam is unbroken. Source: Why won’t my garage door close?
• It can be seasonal: late-afternoon sun hitting the receiving sensor at the wrong angle washes out the beam. Source: Why won’t my garage door close?

Is it safe to use the door right now?

Usually yes: a door that refuses to close is often the safety system doing its job.

• The exception: if you heard a sharp bang before it stopped working, stop and look at the spring. Don’t operate the door. Source: Why won’t my garage door close?
• If a roller has jammed in the track and won’t guide back in cleanly, don’t force the door: that stresses the cables and the spring. Source: Why won’t my garage door close?

DIY or a pro, and why

Start with the checks below; call a technician if they don’t fix it.

• Openers have been required since 1993 (UL 325) to carry two photo-eye sensors near the floor. Anything that breaks their beam stops the door closing, so check them first. Source: Why won’t my garage door close?
• Wipe both lenses with a dry cloth, clear the path between them, and gently angle the receiving sensor until its light goes solid. A cardboard shade fixes a sun problem for good. Source: Why won’t my garage door close?
• If the sensors are clear and the door still reverses partway without hitting anything, the opener’s travel-limit or force setting is off. The manual shows how to adjust it without tools: small changes, testing each one. Source: Why won’t my garage door close?
• Call a technician if a spring or cable is broken, the bottom bracket is bent or pulling away from the door, the door is off its tracks, or you’ve done every check and still don’t know what’s wrong. Source: Why won’t my garage door close?

What the fix involves and costs

• A technician’s diagnosis visit runs $75 to $150. Source: Why won’t my garage door close?
• If the opener responds to nothing, even the learn button on the unit, its logic board may have failed: a replacement board is roughly $60 to $120 for most brands, if the part can be found, or it’s a new opener. Source: Why won’t my garage door close?
• When the opener is over 12 years old and the repair quote is more than $250, replacing it is the better buy: newer units are quieter and safer, with better photo-eye systems. Source: Garage door repair cost in 2026