Check these first (safe for anyone)
- Sensor lights. Each photo-eye near the floor has a small light. If one is off or blinking, it’s out of line or dirty. Wipe the lenses and nudge the bracket until both lights are steady.
- Something in the beam. A rake, a bin, a bike tire or even a cobweb.
- Sunlight. Low winter sun hitting a sensor head-on can confuse it.
- The wall control. Check that lock or vacation mode isn’t on.
- Hold the button. On many openers, holding the wall button down closes the door even with a sensor fault. Watch the door the whole way.
The 9 most common causes
| # | Cause | Fix |
|---|---|---|
| 1 | Sensors out of line or dirty | Clean and realign |
| 2 | Something blocking the beam | Clear it |
| 3 | Close travel limit set wrong | Adjust the limit on the opener |
| 4 | Close force set too low | Adjust force, then retest auto-reverse |
| 5 | Damaged sensor wiring | Repair the wire (staples and lawn tools are common culprits) |
| 6 | Rollers binding in a bent track | Track or roller repair |
| 7 | Broken spring | Spring replacement |
| 8 | Snapped or slack cable | Cable repair |
| 9 | Opener gear or logic board failure | Opener repair or replacement |
When to stop and call
- You see a gap in the spring above the door.
- A cable is hanging loose or the door is crooked.
- The door jerks, binds or comes out of the track.
- The opener hums but nothing moves.
These involve parts under high tension. See spring replacement, cable repair and opener repair. Published Long Island prices: opener repair $85 – $225, both springs $200 – $475.
Never disable the safety sensors
Federal rules (16 CFR Part 1211) have required residential openers to have entrapment protection since 1993, and photo-eye sensors are how most openers meet it. Taping over or removing them takes away the feature that stops a door from closing on a child or pet.
Need it done? Call for garage door opener repair & installation on Long Island. Local guides: garage door repair in Levittown, garage door repair in Commack.
Frequently asked questions
Why does my garage door go back up when I try to close it?
The safety system thinks something is in the way. Usually the photo-eye sensors near the floor are dirty, bumped out of line or blocked, or the close force or travel limit needs adjusting. Federal rules require openers to reverse when that happens.
How do I bypass the sensors to close my garage door?
Hold the wall button down continuously; many openers will close in that mode while you watch the door. Don't tape over or disconnect the sensors. Fix the alignment instead.
Can cold weather stop a garage door from closing?
Yes. Stiff lubricant, a bottom seal frozen to the floor, or a sensor fogged by condensation can all cause problems in winter.