You Heard a Bang and Now the Door Won't Lift — It's Probably a Broken Spring

Short answer: A snapped garage door spring is the single most common reason a door suddenly stops working, and it almost always announces itself with a firecracker-like bang. Knowing what happened, what to avoid, and what a real repair involves keeps you safe and helps you spend wisely.

A snapped garage door spring is the single most common reason a door suddenly stops working, and it almost always announces itself with a firecracker-like bang. Knowing what happened, what to avoid, and what a real repair involves keeps you safe and helps you spend wisely.

How to confirm it's the spring and not something else

Look at the horizontal shaft above the door opening. Most residential doors use a torsion spring wound tightly around that bar; some older or lighter doors use extension springs stretched along the horizontal tracks instead. A broken torsion spring shows an obvious two-to-three inch gap where the coil separated. A broken extension spring will hang slack or be lying on the ground. Other tells: the opener motor runs but the door barely rises, the door feels impossibly heavy when you try it by hand, or it opens a few inches and stops. If the springs look intact but the door still won't move, the problem may instead be a cable, a stripped opener gear, or a track issue — worth mentioning to whoever you call so they arrive with the right parts.

The safety rules that matter most

Springs store an enormous amount of energy, which is exactly why they're dangerous to work on and why a failed one demands respect. Do not keep pressing the opener button hoping it'll catch — a garage door opener is not built to lift a door with a dead spring, and repeated attempts strip its gears or bend the top panel. Don't park under, or walk beneath, a door that's partially open on a broken spring; if the other cable or component gives, it can come down hard. And resist the temptation to replace a torsion spring yourself with hardware-store parts. Winding these springs requires proper bars and technique, and a slip can cause serious injury. If your door has two springs and one broke, plan to replace both — they wear at the same rate, and the second is usually not far behind.

What a same-day spring repair actually involves

A technician will first measure your existing spring's wire size, length, and inside diameter, because the replacement has to match your door's weight precisely — a mismatched spring leaves the door unbalanced and shortens the life of every other part. They'll unwind any remaining tension safely, swap the spring (or springs), re-tension to the correct number of turns, then rebalance and test the door by hand and with the opener. A good tech also checks the cables, rollers, and bearings while they're in there, since those take the strain when a spring is failing. Pricing varies with door size and spring type, so expect an industry range rather than a flat number, and always get the quote confirmed before work begins. Most single-door spring jobs are completed in one visit.

Frequently Asked Questions

How to confirm it's the spring and not something else?

Look at the horizontal shaft above the door opening. Most residential doors use a torsion spring wound tightly around that bar; some older or lighter doors use extension springs stretched along the horizontal tracks instead. A broken torsion spring shows an obvious two-to-three inch gap where the coil separated. A broken extension spring will hang slack or be lying on the ground. Other tells: the opener motor runs but the door barely rises, the door feels impossibly heavy when you try it by hand, or it opens a few inches and stops. If the springs look intact but the door still won't move, the problem may instead be a cable, a stripped opener gear, or a track issue — worth mentioning to whoever you call so they arrive with the right parts.

The safety rules that matter most?

Springs store an enormous amount of energy, which is exactly why they're dangerous to work on and why a failed one demands respect. Do not keep pressing the opener button hoping it'll catch — a garage door opener is not built to lift a door with a dead spring, and repeated attempts strip its gears or bend the top panel. Don't park under, or walk beneath, a door that's partially open on a broken spring; if the other cable or component gives, it can come down hard. And resist the temptation to replace a torsion spring yourself with hardware-store parts. Winding these springs requires proper bars and technique, and a slip can cause serious injury. If your door has two springs and one broke, plan to replace both — they wear at the same rate, and the second is usually not far behind.

What a same-day spring repair actually involves?

A technician will first measure your existing spring's wire size, length, and inside diameter, because the replacement has to match your door's weight precisely — a mismatched spring leaves the door unbalanced and shortens the life of every other part. They'll unwind any remaining tension safely, swap the spring (or springs), re-tension to the correct number of turns, then rebalance and test the door by hand and with the opener. A good tech also checks the cables, rollers, and bearings while they're in there, since those take the strain when a spring is failing. Pricing varies with door size and spring type, so expect an industry range rather than a flat number, and always get the quote confirmed before work begins. Most single-door spring jobs are completed in one visit.

How do I get help with this?

Call (650) 590-9055 and describe the situation, your exact location, and what you need. Timing is confirmed on that call rather than promised in advance.

Call for help: (650) 590-9055 — a straight answer and an honest estimate before any work begins.