A garage door that won’t open is one of those problems that demands an immediate answer — especially if your car is inside. Before you call an emergency repair technician, it helps to know what you’re dealing with. Most cases come down to a handful of causes, and a few quick observations can point you in the right direction.
Start Here: Is It the Opener or the Door?
The first thing to determine is whether the problem is with the opener or with the door itself. Here’s a quick way to tell:
Pull the emergency release cord — the red rope hanging from the opener’s carriage — to disengage the opener. Then try to lift the door manually.
- If the door lifts easily by hand, the opener is the problem. The door mechanism is fine.
- If the door is extremely heavy or won’t budge, the spring is likely broken. The spring is what makes the door light enough to lift — without it, you’re fighting the full weight of the door.
- If the door lifts part of the way and then binds, a cable or track issue may be preventing it from moving freely.
This single test tells you a lot.
Most Common Reasons a Garage Door Won’t Open
Broken Spring
This is the most frequent cause of a door that suddenly won’t open. Garage door springs counterbalance the weight of the door — when one breaks, the opener can’t do the job alone and will typically stop after a few inches or not move the door at all.
A broken torsion spring (the horizontal spring above the door) often makes a loud bang when it fails. If you look at the spring and see a gap in the coil, that’s your answer. This is a repair that needs a professional — springs are under serious tension and aren’t safe to handle without the right tools and training.
Opener Not Working
If the door moves freely by hand but the opener won’t drive it, the issue is in the opener itself. Common causes include:
- Power outage or tripped breaker — check that the opener is plugged in and the circuit is live
- Dead remote batteries — try the wall button; if that works, it’s the remote
- Logic board failure — the brain of the opener can fail, especially on older units
- Stripped drive gear — you may hear the motor running but nothing engaging
- Disconnected trolley — if the carriage disconnected from the drive, the opener runs but doesn’t pull the door
Broken or Snapped Cable
Cables run along each side of the door and help guide it evenly along the tracks. A snapped cable can cause the door to tilt, bind, or refuse to move. You may be able to see a loose or dangling cable along the track. Don’t operate the door if a cable has snapped — the door is unbalanced and could fall.
Door Off Track
If the door has jumped its track — from a vehicle bump, a broken roller, or a sudden impact — it won’t open properly and may jam partway up. You may notice the door looks uneven or hears a grinding noise when the opener tries to run. Leave it and call for service rather than forcing it.
Locked Manual Lock
Some garage doors have a manual sliding lock bar in the center of the door. If it’s engaged — accidentally or deliberately — the door won’t open regardless of what the opener does. Check that the lock is fully disengaged before assuming a mechanical failure.
Sensitivity or Force Settings
Openers have adjustable force and travel settings. If something shifted these settings — or if the door has become harder to move over time — the opener may stop short of fully opening because it thinks it’s met resistance. This is more common on older openers and is a quick adjustment.
When to Call for Emergency Service
If you’ve worked through the checks above and the door still won’t open — especially if your car is inside or the door is stuck in a position that compromises security — it’s time to call.
A door that won’t open due to a broken spring or cable isn’t something to put off. Both issues can worsen if the door is forced, and the repair itself is straightforward when handled correctly.