You press the button, the garage door starts down, then stops and goes right back up — or it won’t budge at all and the opener light blinks. It’s frustrating, especially when you’re trying to leave. The good news: many causes are simple and some you can check yourself safely.
1. Safety sensors are blocked or misaligned
Every modern opener has two small photo-eye sensors mounted a few inches above the floor on each side of the door. If the invisible beam between them is broken, the door won’t close — or it reverses.
- Look for anything in the path: a broom, a trash can, a toy, leaves, or even a spider web on the lens.
- Check the indicator lights on each sensor. On most models, a steady light means aligned; blinking or off means a problem.
- Gently wipe the lenses with a soft cloth.
- If a sensor has been bumped, it may be pointing slightly off. Loosen the wing nut, aim it at the other sensor until the light is steady, and tighten.
2. Sun glare (a very Texas problem)
Low morning or evening sun shining straight into a sensor lens can overwhelm it, so the door reverses at the same time of day, every day. West- and east-facing garages in DFW see this a lot. Moving the receiving sensor to the shaded side of the door (swapping the two sensors), or adding a small sun shield, often fixes it. If you’re not sure which sensor is which, we can help.
3. Close-force or limit settings are off
Openers have a limit setting (how far the door travels) and a force setting (how hard it pushes before deciding something is in the way). If the limit is set too far, the door hits the floor, “thinks” it hit an obstruction, and reverses. Heat, seasonal slab movement or a new bottom seal can change how the door meets the floor.
Adjusting these is possible on many openers, but increasing force too much can defeat the safety system. If you adjust anything, always re-test auto-reverse afterward (see below).
4. The door itself is binding
An opener reacts to resistance. If the door rubs in the tracks, a roller is broken, a hinge is cracked, or a dented panel catches, the opener may reverse to protect itself. Signs include jerky movement, grinding sounds, or the door reversing at the same spot every time. This isn’t an opener problem — it’s a door repair.
5. A spring is weak or broken
If the door is out of balance, closing can be uneven and fast on one side — or the opener may refuse to lift it at all. Disconnect the opener with the door closed and try lifting it halfway. If it’s very heavy or drops, the springs need attention. Don’t keep running the opener; see our spring repair page.
6. Remote, keypad or wall button issues
If the door doesn’t respond at all, try the wall button. If the wall button works but remotes don’t, replace the remote batteries and check whether a “lock” or “vacation” mode is turned on at the wall control. If nothing works, check the outlet and breaker — summer storms can trip GFCI outlets in the garage.
7. Worn opener parts or logic board
Heat inside a DFW garage is hard on electronics and plastic drive gears. A humming motor with no movement, a door that stops at random points, or an opener that works intermittently can point to a worn gear, a failing capacitor or a damaged logic board after a power surge. See opener repair and installation.
Always test auto-reverse
Once a month — and after any adjustment — place a roll of paper towels (or a 2×4 laid flat) on the floor under the door and close it. The door should reverse shortly after it touches the roll. If it doesn’t, stop using the opener until it’s fixed. Never disable sensors to force a door closed.
When to call
Call if the sensors are aligned and clean but the door still reverses, if the door is heavy or crooked, if you hear grinding, or if you’re stuck with the door open overnight. We offer 24/7 emergency service across Dallas–Fort Worth.