Published 2026-05-30 · Dallas Garage Door
That Loud Bang from the Garage? Probably a Broken Spring
Quick answer: A loud bang from your garage is almost always a torsion spring breaking under tension, these steel coils hold 200+ pounds of door weight and snap suddenly when metal fatigue sets in. In Dallas's heat cycles (summer attic temps hit 140°F+), springs usually last 7–10 years before failing, often during temperature swings at dawn or after a cold front.
Why Garage Door Springs Fail With a Bang
Torsion springs store enormous energy in tightly wound steel, enough to counterbalance a 150–250-pound garage door. When the metal finally fatigues (usually after 10,000–15,000 cycles), that energy releases instantly as a loud crack or gunshot-like sound. The noise comes from the spring unwinding at high speed and the metal ends whipping against the shaft or door hardware.
Dallas County homeowners hear this more often in spring and fall when 40-degree overnight temperature drops stress already-worn springs. The metal contracts quickly, adding just enough tension to push a weakened coil past its breaking point. Older neighborhoods in East Dallas, Lakewood, and Oak Cliff, where homes were built in the 1950s–1980s, see frequent spring failures simply because original springs are long overdue for replacement.
Heat accelerates the problem. Attics in Plano and Richardson regularly exceed 130°F June through August, and that constant thermal cycling weakens the steel's molecular structure. A spring rated for 10,000 cycles might only deliver 7,000 in our climate before snapping.
What Happens After the Spring Breaks
Once a torsion spring snaps, your garage door becomes dead weight. Electric openers can't lift it, the motor lacks the muscle to move 200+ pounds without the spring's counterbalance. If you try to open the door manually, you'll feel the full weight and risk injury or damaging the panels if you lose your grip.
You'll see a visible gap in the spring coil above the door (torsion systems) or a dangling cable and loose spring on the side (extension systems, common in older Irving and Garland homes). Don't attempt repairs yourself, the intact spring on a two-spring system still holds lethal tension, and winding a new spring requires specialized bars and precise torque calculations.
Replacement cost in Dallas runs $200–$400 for a standard torsion spring pair, including labor and a warranty. Converting old extension springs to a safer torsion setup costs $350–$600. Most techs can complete the job in 60–90 minutes, restoring full function and rebalancing the door.
Preventing the Next Loud Bang
Springs don't fail without warning. Listen for squeaking or groaning during operation, that's the sound of dry, worn coils rubbing together. Doors that hesitate when opening or close too fast have lost spring tension. If your door was installed before 2015 and you've never replaced springs, you're in the failure zone.
Annual tune-ups ($90–$150) include spring inspection, lubrication, and cycle testing. Techs measure the door's balance by disconnecting the opener and manually lifting it halfway, it should stay put, not slam down or shoot up. A tune-up with roller replacement runs $160–$260 and addresses both springs and the hardware that wears alongside them.
High-cycle springs (25,000–30,000 rated cycles) cost slightly more upfront but last 15+ years in Dallas heat. They're worth it for daily-use doors in families with multiple cars. Weather sealing ($180–$300 for full perimeter seals) also helps by reducing temperature extremes inside the garage, which slows spring degradation.
When to Call for Service
If you heard the bang and the door won't budge, don't force it. Disconnect the opener (pull the red emergency release cord) and leave the door closed until a tech arrives. Forcing a broken-spring door damages rollers, bends tracks, and can injure you if the door suddenly drops.
Same-day service is standard across Dallas, Plano, and Richardson for spring breaks, most companies stock common residential springs on the truck. Off-track repairs (if the door jumped the rails during the break) add $150–$350 to the bill. Panel replacement for buckled sections runs $300–$700 depending on door style and material availability.
Never attempt to wind springs using YouTube tutorials or borrowed tools. The winding bars must match the spring's shaft diameter exactly, and improper tension causes the door to bind, cables to snap, or, worst case, the spring to explode during tensioning. Licensed techs carry liability insurance for exactly this reason.
Frequently asked
Can I still use my garage door opener if only one spring broke?
No. Even if you have two springs and only one broke, the door is dangerously unbalanced. The opener motor will strain, overheat, or strip its gears trying to lift the extra weight. Manual operation is unsafe because the door can fall unexpectedly. Leave it closed until both springs are replaced.
How long do garage door springs last in Dallas heat?
Standard 10,000-cycle springs last 7–10 years with typical use (2–3 cycles per day). Dallas attic heat shortens that to the lower end of the range. High-cycle springs rated for 25,000+ cycles can reach 15 years but cost 30–40% more upfront. Annual lubrication helps maximize lifespan in our climate.
Why do springs break in the morning or during cold snaps?
Metal contracts in cold temperatures, adding tension to already-stressed springs. A 40-degree overnight drop in Dallas, common in March and November, can be the final straw for a spring nearing the end of its cycle life. The bang usually happens when you first open the door after the temperature swing.
Should I replace both springs if only one broke?
Yes. If one spring failed, the other has endured the same heat cycles and door operations, it's weeks or months from breaking too. Replacing both at once ($200–$400 total) avoids a second service call and ensures balanced tension. Mismatched springs cause uneven wear on rollers and the opener.
Is it safe to park my car in the garage after a spring breaks?
You can park inside if the door is already open, but don't close it manually or try to use the opener. A broken-spring door can fall suddenly if nudged or if the remaining hardware shifts. If the door is currently closed, leave it that way and use another entrance until repairs are complete.