Why Won't My Garage Door Open? How to Tell What's Wrong

If your garage door won't open, what it's doing right now tells us what's wrong. We see all three of these on service calls: a silent door, a humming opener, and a door sagging on one side, and each carries a different risk level. This guide walks you through your symptom and what's safe to check yourself.

Why won't my garage door open?

A garage door usually stops opening for one of three reasons: no power is reaching the opener, the opener is powered but something mechanical is stopping the door from moving, or a safety feature (sensors, lock mode) is intentionally blocking it. Matching your exact symptom to the sections below tells you which category you're in and what to do next.

Is it safe to check anything yourself before calling for repair?

Some checks are genuinely safe: replacing remote batteries, cleaning sensor lenses, checking a breaker, or confirming the wall console isn't in lock mode. The torsion spring above the door and the lift cables at the bottom corners are not DIY territory. They're under heavy mechanical tension and can cause serious injury if they let go.

The door won't move at all, and the opener is silent

We see this one a lot: opener dead silent, no light, no motor sound. Nine times out of ten it's a power problem: a tripped breaker, an unplugged cord, or a trolley left manually disconnected. Check power first.

What this usually means

Common causes include a tripped breaker, an unplugged opener, a garage outlet on a GFCI that's popped, or the trolley carriage manually disconnected (look for a dangling red release cord).

Safe to check yourself

Check the breaker panel, confirm the opener is plugged in and the outlet has power (test with another device), and look at the manual release cord. If none of that explains it, replace the remote and wall console batteries before assuming the opener itself has failed.

The opener hums or clicks but the door doesn't move

This is the one we take most seriously. A motor that hums or strains without lifting the door is trying to move weight it can't handle, almost always a broken spring or snapped cable. Stop using the opener and call us.

What this usually means

The opener isn't designed to lift the full weight of the door by itself; the spring does almost all the work, and the opener just guides it. When the spring fails, the motor strains uselessly against dead weight it can't move.

Why this is a stop-and-call-a-pro symptom

Do not keep pressing the button. Repeated attempts can burn out the motor compensating for a failed spring, and if a cable snapped, forcing the door can let it fall unevenly. Turn off the opener and call our garage door repair technicians rather than troubleshooting further yourself. Spring replacement typically runs $350 to $540 installed for a matched pair of torsion springs (professionals recommend replacing both at once, since one failing spring means the other is close behind), and professional installation is strongly recommended because of the tension involved (This Old House, Garage Door Spring Replacement Cost).

What are the signs of a broken garage door spring?

A broken spring almost always announces itself with a loud bang from the garage, followed by a door that feels far heavier than usual or won't stay up when the opener is disengaged. A visible gap in the coiled spring above the door means it has already failed and shouldn't be operated.

The loud bang homeowners remember

Torsion springs fail suddenly under fatigue, not gradually. Most homeowners describe a single loud pop or bang, sometimes loud enough to be mistaken for a gunshot, and it's usually the first sign that anything is wrong. Larry's heard this account from customers more times than he can count. Residential torsion springs carry a baseline rating of about 10,000 open-close cycles under industry standard DASMA TDS-190, and at an average of four uses a day, that works out to roughly 6 to 7 years of typical use before a standard-cycle spring reaches the end of its rated life (DASMA TDS-190 spring cycle-life reference).

A visibly gapped or separated torsion spring above the door

Look up at the horizontal shaft above the closed door. A healthy torsion spring is a tightly wound coil with no visible break. A failed spring will show a clear separation in the coil, sometimes with the two ends twisted apart. If you see this, don't attempt to open or close the door until it's repaired.

The door feels heavy or won't stay up when manually released

Pull the manual release cord and try lifting the door by hand. It should move smoothly and stay roughly balanced partway up. If it feels like dead weight or slams back down, the spring is no longer supporting the door's weight, which is exactly the failure this system is designed to prevent when working correctly.

One side of the door is sagging, crooked, or off track

A door sagging or crooked on one side almost always means one lift cable has broken while the other still holds. This typically shows up once a cable frays or a roller jumps the track. Don't force the door. Call a technician.

What a broken or frayed cable looks like

If the door hangs noticeably lower or crooked on one side, check the bottom corners where the lift cables attach to the rollers and bracket. A broken cable is usually visibly loose, frayed, or hanging free. Sometimes only one cable fails while the other holds, which is exactly what pulls the door out of level.

Why an off-track door is not a DIY fix

A door that's off track or held by only one cable is under unbalanced tension and can shift or fall further if it's forced open, closed, or manually adjusted. This is a "garage door cable off track" situation that calls for a technician who can safely relieve the spring tension before touching the cables or track. Do not try to re-hang a cable or force the door back into alignment yourself; we handle that by relieving the spring tension safely first.

The door opens partway and stops, or reverses on its own

This one is usually easier than it looks. Most cases we run into trace back to dirty or misaligned safety sensors near the bottom of the tracks, which trigger an automatic reversal by design. Check the sensors first before assuming anything worse.

Safety sensor misalignment

If the door starts up or down and then reverses before finishing, the two safety sensors near the bottom of the tracks are the most likely culprit. Every residential opener sold in the U.S. since January 1, 1993 has been required to include this kind of entrapment protection, and it's designed to reverse the door the instant its beam is broken or the sensors are misaligned (CPSC, Safety Commission Publishes Final Rules For Automatic Garage Door Openers). Wipe the lenses clean, check that both sensor LEDs are lit steady rather than blinking, and make sure nothing (a bike, a storage bin) is sitting in the beam's path.

Travel limit or force settings

If the sensors are clean and aligned but the door still stops short or reverses, the opener's travel limit or force settings may need adjustment, especially on older units. These settings control how far the door travels and how much resistance it tolerates before reversing, and getting them wrong can make a door that seems to reverse randomly. This adjustment is opener-specific, and it's something we can usually dial in correctly on the first visit rather than by guesswork from the manual.

What does it mean if my garage door is making noise before it stopped working?

Noise almost always shows up before a full failure, and the type of sound points to the cause. Grinding or squealing usually means dry rollers or hinges that need lubrication. A rhythmic popping or knocking can mean a worn roller hitting a track seam. A single loud bang, as covered above, means a spring has already broken.

Garage door openers have an average service life of 10 to 15 years, with belt-driven units running 15 to 20 years under moderate use and routine maintenance (Angi, How Long Can Garage Door Openers Last?). New or worsening noise on an opener approaching that age range is worth a look before it becomes a no-open emergency.

My remote or keypad stopped working. Is that connected?

Not usually a sign of a bigger mechanical problem. Dead batteries in the remote or keypad are the most common cause, followed by lost programming after a power outage or breaker trip. Many wall consoles also have a vacation or lock mode that disables all remotes, which is easy to bump by accident.

Replace batteries in both the remote and keypad, then check the wall console for a lock icon and switch it off. If that doesn't help, a keypad replacement is a simple, inexpensive service call, not a spring or cable issue.

When should I stop troubleshooting and call a professional?

Stop and call for any symptom involving the spring above the door, a loose or frayed cable, a bent track, or a door that feels unusually heavy when manually lifted. These all involve stored mechanical tension that can injure you without the right tools. Everything else, sensors, batteries, breakers, lock mode, is safe to check yourself first.

Here's a quick recap of every symptom we cover above:

Symptom	Most Likely Cause	Safe to Check Yourself?	Urgency
Door silent, opener dark	Power issue (breaker, outlet, unplugged)	Yes	Low
Opener hums, door won't move	Broken spring or snapped cable	No	High, stop using it
Loud bang heard earlier	Torsion spring failure	No	High
Door sagging or crooked	Broken or frayed lift cable	No	High
Opens partway, reverses	Dirty or misaligned sensors	Yes (cleaning/alignment)	Low
Grinding or squealing	Dry rollers, worn hardware	Yes (lubrication)	Medium
Remote or keypad dead	Batteries, lock mode, lost programming	Yes	Low

The pattern in that table is simple: anything involving stored spring or cable tension is a stop-and-call-a-pro symptom, while power, sensor, and remote issues are usually safe to check yourself first.

Why do garage doors in St. Charles County break down more in certain seasons?

Yes. Steel hardware expands and contracts with temperature, and St. Charles County, Missouri, sees roughly a 66-degree seasonal swing between average January lows and July highs, plus humidity that climbs into the 70s percent range each winter. That repeated expansion and contraction adds wear to springs, tracks, and opener hardware year after year.

The St. Louis metro area, which covers St. Charles County, averages a January low around 24°F and a July high near 90°F (Current Results, St. Louis, MO Average Temperatures by Month, based on NOAA 1991-2020 climate normals), with relative humidity swinging from about 63% in spring to the mid-70s in winter (Weather-and-Climate.com, St. Louis Humidity by Month). That cycle doesn't cause a spring to fail on its own, but it does add wear on top of the normal cycle count, which is part of why late-summer and mid-winter service calls both tend to spike for St. Charles County homeowners.

If you're in the Wentzville area and can't tell which symptom you're dealing with, that's exactly what we're here for. Give us a call, describe what the door is doing, and our Wentzville-based team can usually tell you over the phone whether it's a quick fix or needs a technician on site. Ready to get it looked at? Request a free bid and we'll get you back in and out of your garage the same day when we can.