CHARLOTTE GUIDE

A bang overhead, then a door that will not stay up

Something cracked or popped above the opening, and now the door barely moves or slams if you try. That sound is often a torsion spring letting go. Stay off the ladder. The shaft, the cones, and the winding hardware are not a careful-homeowner project, in a South End alley garage or anywhere else in Mecklenburg County.

By Mike Maziarz · Sources checked October 6, 2026 · How we write these guides

What the bang usually means

A torsion spring is a coiled bar of steel on the shaft over the door. It is wound so the door's weight feels manageable. When the steel breaks, the stored twist releases all at once. People describe a shotgun sound in the garage and then a door that the opener cannot lift, or a door that flies up and will not stay put if it was already moving.

Look from the floor. A gap in the coil, a spring in two pieces, or a shaft that sits oddly in the bearing plate is enough to see. You do not need to touch it to confirm the obvious. If the door is partway up, do not walk under it to inspect the gap. A broken spring means the door can fall. Clear people and pets out of the opening and leave the opener idle.

Do not wind, unwind, or grab it

Torsion springs and the cables that work with them are not a homeowner repair. Do not wind them, do not unwind them, and do not grab a spring, a cable, or a winding cone to see if it is loose. The bars sold for that job exist because the force is larger than hands. A slip drives the bar, or the cone, into whoever is on the ladder. Extension springs along the tracks are the same class of hazard even though they look simpler.

Unplug the opener so a remote in a car cannot start a cycle while you are still in the garage. If the door is down and staying down, that is the safer place for it to wait. If it is open, do not pull the emergency release unless a person can actually hold the full weight. A weak or broken spring can let the door fall the moment the opener stops holding it. Keep the house door locked if the garage is attached and the opening cannot be closed.

The motor did not replace the spring

An opener is built to move a balanced door, not to be the lifting muscle. After a spring breaks, the motor may hum, the trolley may click, and the belt or chain may jump. Running it again overheats the unit and can strip a gear or bend the top section. Treat a new hum as a reason to stop, not as a second try with a longer press on the wall button.

Sorting the motor from the door is its own question, covered under opener or door. After a bang, start with the spring. A healthy opener on a dead spring still loses. Mention whether the opener worked an hour earlier. That timeline tells the technician the motor was not the first thing to fail. It also keeps anyone from selling a new opener before the door is weighed and the spring is matched.

Slack cable, crooked door, and a close that fails

Springs and cables share the load. When one spring on a two-car door breaks, the other side may still hold for a moment, and the door racks. A cable can go slack or jump a drum. Leave it. Pulling a loose cable back onto a drum by hand is how people get a hand in the hardware. Say which side dropped, and stop there.

A door with a broken spring may also refuse to close in a controlled way, or it may drop. That is not a sensor problem to solve with tape. The door that will not close has several ordinary causes, and a failed spring is the one you do not experiment on. If the door is crooked in the opening, do not try to level it by lifting one corner. Note the gap and wait.

One spring, both springs, or a tired door

On many double doors the torsion system is a pair. When one breaks, the mate has lived the same number of cycles. Technicians often recommend replacing both so the new one is not paired with a spring that is already near the end. That is a scope question, not a price this page can invent. Ask what they measured, the wire size and length they are matching, and whether the drums and cables are still sound.

A wood door on an older bungalow in Elizabeth or Wesley Heights can be heavier than it was when the spring was new, especially after humid summers swell the sections. A steel door with a dented panel is a different weight problem. If the sections are creased, the tracks are crushed, or this is the second spring failure on a door that already looks tired, read the repair or replace notes before you assume a spring-only visit is the whole job.

What to ask before someone arrives

Say there was a bang, the door is heavy or crooked, and you have not touched the shaft. Give the width, single or double, and whether the spring is above the door or stretched along the tracks. A photo from the floor is useful. If the house is in Dilworth, NoDa, Myers Park, or out in Huntersville, the address decides which counter handles any permit question. Do not invent a state license number for garage-door work. Ask the company what credential applies and check it.

The questions before hiring list is the longer version: written scope, who does the work, and what they will not bypass. For a spring, add one more. Ask them to confirm they will not ask you to hold the door or hand them a winding bar. You want a crew that brings the right cones and bars and treats the shaft as their risk, not yours. Humid Piedmont air rusts hardware. It does not make a spring safer to wind.