Garage Door Won’t Close Repair

Nine times out of ten, a door that starts down and pops back up is a safety-sensor issue; the rest are travel-limit drift, a bound roller, or an obstruction the opener interprets as resistance. Alfonso sorts out which one you have in a single San Francisco visit and fixes it on the spot — most won't-close calls resolve for $90–$260 including the diagnosis.

What does it cost in San Francisco?

Diagnosis (credited toward the repair)	$45–$95
Sensor realignment or replacement	$90–$260
Travel limit and close-force recalibration	$90–$160

Typical San Francisco and Bay Area ranges (parts + labor), last updated July 2026 — see the full SF garage door cost guide. You get an exact, upfront quote before any work begins — call (415) 494-4774 or book online.

Common Causes for a Door That Won't Close

A door that won’t close is a symptom, not a single problem. The cause is most often related to the safety systems, but it can also be a sign of mechanical or opener-related issues.

Symptoms & Likely Causes:

Door Reverses Immediately (or Blinking Opener Light)

This is the most common issue, and it almost always points to your Safety Sensors. If the opener light flashes 10 times, it’s a sensor error code. The invisible beam is blocked or misaligned.

Door Stops & Reverses After Hitting the Floor

If the door closes all the way, hits the floor, and then immediately goes back up, your opener’s “close travel limit” is set incorrectly. It “thinks” the floor is an obstruction.

Door Won't Close from Remotes (But Wall Button Works)

This is often a control issue. The “Lock” or “Vacation” mode button on your main wall console may have been accidentally pressed, which locks out all remote signals.

Can I Fix It Myself?

For this issue, yes, there are several safe troubleshooting steps you should try before calling a professional. Many “won’t close” problems are simple fixes.

Safe DIY Checks:

Check for Obstructions: Look in the tracks and on the floor. Remove any items, leaves, or debris.
Clean the Sensor Lenses: The sensor "eyes" get dirty. Wipe them with a soft, clean cloth.
Check Sensor Alignment: Look at the small LED lights on both sensors. They should both be solid and bright. If one is off or flickering, gently bend the bracket by hand until both lights are solid.
Check the "Lock" Button: Look at your main wall-mounted control and make sure the "Lock" light is not on.

When to Call a Professional

If you’ve cleaned and aligned the sensors, but they still won’t light up (they may be faulty or have bad wiring).
If the door is visibly crooked or jamming in the tracks.
If the opener settings (travel limits or force) need to be adjusted.
If you’ve tried everything and it still won’t close.

What to Do Right Now If Your Door Won't Close

Follow these steps in order:

Step 1: Look for and remove any physical obstructions.
Step 2: Wipe the lenses of both safety sensors.
Step 3: Check the sensor alignment lights. Adjust them until they are both solid (e.g., one green, one amber). Try the remote again.
Step 4: If it still won't close, you can secure your door for the night by pressing and holding the main wall-mounted button. You must hold it without letting go until the door is fully closed.
Step 5: Call a professional. An overridden sensor is not a fix and leaves your door unsafe. Call Alfonso Garage Door at (415) 494-4774 for a proper diagnosis.

How Long Does Repair Take?

This is usually a fast repair because the problem is often diagnostic.

Typical Repair Timeline:

Our technicians are diagnostic experts and can find the root cause quickly to get your door secured.

Preventing Future Closing Problems

Most closing problems start small — a misaligned sensor or a drying seal — and are cheap to catch early.

Common Causes of Failure:

Misaligned Sensors: Easily bumped by garbage cans, bikes, or kids.
Dirty Sensor Lenses: Dust, cobwebs, and pollen block the beam.
Opener "Lock" Mode: The wall panel lock is accidentally on.
Opener Travel Limits: The opener's settings are off and it "thinks" the floor is an obstruction.

Need Help Securing Your Garage? We're Ready to Help!

Don’t leave your home unsecure overnight. A garage door that won’t close is an open invitation. Our technicians are on call, ready to provide fast, same-day service to diagnose the problem and get your door shut and locked.

Why Choose Alfonso Garage Door?

Same-Day Service Available - We understand you can't wait days for repairs
Experienced, Insured Technicians - Our team has 15+ years of combined experience
Transparent Pricing - Clear estimates before we start, no hidden fees
Quality Parts & Workmanship - We use high-cycle springs rated for 20,000+ cycles

Our Expert Technicians

Safety is Our Top Priority

We adhere to the highest industry standards for safety. A broken spring repair is dangerous, and we take that risk seriously.

We follow all DASMA Garage Door Safety Guidelines on every job.
Our safety protocols and training are aligned with OSHA Safety Standards to protect both our technicians and your property.

A Seasonal Warning for Homeowners

As the seasons change, two things stop a door from closing: sunlight and frost. In the fall and winter, the low-angle sun can shine directly into a sensor’s “eye,” blinding it and preventing the door from closing. On cold, frosty mornings, condensation can fog the lens, which also blocks the beam. This is also the time spiders build webs in front of the lens. Before you call, always wipe the sensor lenses clean and check if direct sunlight is the culprit.

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Frequently Asked Questions

Why does my garage door opener light blink 10 times?

This is a specific error code for LiftMaster, Chamberlain, and Craftsman openers. It means the safety sensors are misaligned, blocked, or faulty.

Why does my door reverse right when it hits the floor?

Your opener's "close travel limit" is set too far. It's programmed to go past the floor, so when it hits, it "thinks" it's an obstruction and reverses. This is a simple opener adjustment.

How do I bypass my garage door sensors to close the door?

You can temporarily bypass the sensors by pressing and holding the main wall button inside your garage. Do not let go until the door is fully on the ground. This should only be used to secure your door until a repair can be made.

Why won't my remotes close the door, but the wall button works?

First, check the "Lock" or "Vacation" button on your wall console. If that's not the issue, it could be a sign of faulty remotes or a problem with the opener's radio receiver.

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Sunday - Friday

7:00 AM - 11:00 PM

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Garage Door Won't Close — Common Questions

The door closes, touches the floor, then reverses back up. Why?

That's a travel-limit problem, not sensors. The opener thinks the floor is an obstruction because its programmed down-limit is set past where the floor actually is, so the moment the door lands, the force sensor trips and reverses it. Concrete settling and new weather seals both shift the effective floor height. Recalibrating the limits fixes it — typically $90–$160.

Why does my door only refuse to close at certain times of day?

Time-of-day patterns almost always mean light or moisture, not mechanics. Late-afternoon sun blinding one photo-eye is classic in west-facing garages near the beach, and morning fog condensation on the lens does the same on damp days. Both are sensor-environment problems with cheap fixes — shields, repositioning, or a lens clean.

How much will fixing a door that won't close cost me?

Most of these calls in San Francisco close out between $90 and $260 total. Sensor work runs $90–$260 depending on whether parts are needed, and limit recalibration runs $90–$160. The $45–$95 diagnostic folds into the repair price, and you approve the exact figure before we start.

Can I leave the door open overnight until it's fixed?

We'd treat it as urgent instead — an open garage in the city is an invitation, and in garage-under-home houses it's a direct path inside. As a stopgap, most openers will close if you press and hold the wall button until the door seats. If even that fails, call us; overnight calls are exactly what our 24/7 line at (415) 494-4774 exists for.

Could the problem be the door itself rather than the opener or sensors?

Yes — a binding roller, a track pinch point, or a sagging hinge line can create real physical resistance partway down, and the opener correctly reverses off it. The tell is that the door also feels rough or catchy when you move it by hand with the opener disconnected. We check the mechanical side on every won't-close call, precisely because it gets missed.