Garage Door Won't Close — Causes & Fixes
Garage door won't close? Blocked sensor, misaligned track, opener limit issue, or broken cable — we diagnose and fix same day across NYC, Long Island, and New Jersey. Call (929) 429-2429.
Why Won't My Garage Door Close?
A garage door that refuses to close is both frustrating and a security issue. The good news: most causes are diagnosed and fixed same day. Here are the most common reasons:
1. Safety Sensor Blocked or Misaligned
This is the #1 reason a door won't close. Every opener built after 1993 has photo-eye sensors near the floor that stop the door if anything breaks the beam. Check both sensors — if one is flashing, it's either misaligned or something is blocking the beam. Clean the lens and check alignment. The sending sensor (amber) and receiving sensor (green) must face each other directly.
2. Sensor Wiring Damaged
If the sensor lights are off entirely, the wiring to one sensor may be cut or disconnected. This often happens from a car tire running over the wire. The opener defaults to "won't close" as a safety measure. Our technicians re-run sensor wiring same day.
3. Opener Close-Limit Setting Off
Openers have a "close limit" that tells the motor how far to travel before stopping. If this limit is set too short, the door stops before it seals the floor. Usually a simple adjustment on the opener head unit or via the smart phone app.
4. Bent or Obstructed Track
A dent or debris in the vertical track near the floor will stop the door from reaching the fully closed position. Inspect both tracks for visible bends or objects lodged in the channel.
5. Remote Control Issue
If the door opens but won't close from the remote (but closes from the wall button), you may have a signal issue — usually solved by reprogramming. If it won't close from either, the issue is the opener, sensor, or track.
6. Broken or Worn Bottom Seal Catching
A deteriorated bottom weatherstrip can fold under and prevent full closure. The door stops a few inches off the floor. Replace the bottom seal to solve this.
7. Broken Spring Causing Imbalance
A partially broken spring may allow the door to open but cause the opener to reverse when closing because it senses excessive resistance. Test balance by disconnecting the opener and lifting the door to waist height — it should stay without drifting.
Quick Sensor Check You Can Do Right Now
- Look at both sensors near the floor on each side of the door frame
- The sending sensor (amber/yellow light) and receiving sensor (green light) should both glow steadily
- If one is blinking, gently realign it by loosening its wing nut and repositioning until both glow solid
- Check for any objects, dirt, or spider webs blocking either sensor lens
- If lights are both solid but door still won't close, the issue is beyond sensors — call (929) 429-2429
Frequently Asked Questions
Why won't my garage door close all the way?
The most common cause is a blocked or misaligned safety sensor. Check both sensors near the floor — they should have solid indicator lights. A flashing light means the beam is broken. Also check for debris in the track and test whether the close-limit setting on your opener needs adjustment.
How do I fix garage door sensors that are misaligned?
Loosen the wing nut on the flashing sensor (usually the receiver on the right side), gently move it until the indicator light glows solid, then re-tighten. Both sensors must face each other directly with nothing blocking the invisible beam between them.
My garage door closes halfway then reverses — why?
The door's auto-reverse is triggering. Common causes: something breaking the sensor beam, a close-limit setting that's too tight, a worn bottom seal catching on the floor, or the opener detecting excessive motor load due to a failing spring.
Can I close my garage door manually if it won't close with the opener?
Yes — pull the red emergency release cord to disconnect from the opener, then lower the door manually and lock it with the slide bolt. Then call for a repair. A door left open is a security risk. Call (929) 429-2429.
How much does it cost to fix a garage door that won't close in NYC?
Sensor alignment is $75–$150. Sensor replacement is $100–$175. Opener limit adjustment is $75–$120. Track repair is $100–$200. We provide a free on-site diagnosis. Call (929) 429-2429.
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