Sensor blockage or misalignment
An object, cobweb or bumped bracket breaks the infrared beam, so the opener reverses.
Door movement
Garage Door Closes Then Opens Again
If your garage door starts closing and then reverses back up, the opener thinks something is in the way. That is the safety system doing its job, but the trigger may be a sensor, a setting or the door itself.
Short answer
The most common cause is the photo-eye safety sensors: dirty lenses, a bumped bracket or sunlight shining into the receiver. Other causes include a close limit or force setting that is off, or a door that binds partway down. Clean and check the sensors first; if that does not fix it, book a technician.
Likely causes
Sunlight interference
Low sun shining into the receiving sensor can confuse it, often at the same time each day.
Force or limit settings
If the opener senses resistance before it expects to, it may reverse. See force adjustment.
Binding or obstruction
A bent track, worn roller or dragging seal can create resistance that triggers reversal.
Safe checks you can make
- Look for objects, leaves or cobwebs near the sensors
- Wipe both sensor lenses with a soft cloth
- Check that both sensor lights are steady, not blinking
- Note whether it happens at a particular time of day
- Watch the door from inside to see where it reverses
Stop and call a technician if
- The door reverses even with sensors clean and aligned
- You see a bent track or loose roller
- The door does not reverse when it touches something
- The opener strains or makes grinding noises
What a technician may inspect
- Sensor alignment, wiring and lens condition
- Opener close limit and force settings
- Door balance and smooth travel in the tracks
- Contact reversal with a test object
Describe what the door is doing when you call. A provider may ask follow-up questions, but a reliable price normally needs an on-site look rather than a phone-only quote.
Services that address this problem
Garage Door Sensor Repair
Photo-eye sensors sit a few inches above the floor on each side of the door.
Opener Safety and Force Adjustment
Travel limits tell the opener where fully open and fully closed are.
Garage Door Opener Repair
An opener only moves the door; it should never be doing the heavy lifting.
Frequently Asked Questions
The opener reverses when its sensors detect a blocked beam or when it senses resistance. Dirty or misaligned sensors are the most common cause, followed by limit or force settings and binding hardware.
Yes. Strong sun shining directly into the receiving sensor can interfere with the beam, especially on east- or west-facing doors. A technician can reposition or shade the sensor.
Loosen the bracket slightly, point both sensors at each other until the indicator lights go steady and retighten. If lights stay off or blink, the wiring or sensor may be faulty.
Holding the wall button can force some openers to close despite a sensor fault. It is a temporary workaround only. Watch the door closely and arrange repair soon.
A new, thicker seal can change where the door meets the floor. If the close limit is not adjusted, the opener may sense resistance and reverse.
Call if cleaning and aligning the sensors does not help, if you see damaged hardware or if the door fails to reverse when it touches something.
Get your garage door working safely again
Call to schedule a technician visit with an independent provider who serves your area.