How to Tell If Your Garage Door Spring Is Broken — 5 Signs

Garage door spring failure is the most common garage door problem Kansas City homeowners face — accounting for roughly 40% of all service calls. Springs are under constant tension supporting 150–400 pounds of door weight, and they have a finite lifespan. Knowing the signs of a broken spring helps you act quickly, avoid injury, and get the door fixed the same day. Here are the five signs to look for.

What Are the 5 Signs of a Broken Garage Door Spring?

The five signs of a broken garage door spring are a loud bang, an extremely heavy door, a door that stops at 6 inches, a visible gap in the spring coil, and an uneven door angle. Any one of these signs warrants an immediate call to a professional — do not attempt to operate the door further.

1. You Heard a Loud Bang From the Garage

A loud bang or crack — like a gunshot — is the most dramatic and unmistakable sign of a torsion spring failure. Torsion springs are wound under enormous tension, and when one breaks, the stored energy releases explosively. The sound is caused by the coil snapping and the metal striking the torsion tube or shaft above the door. Many homeowners hear the bang from inside the house and initially assume something fell in the garage — only to find the door won't open when they investigate.

2. The Door Feels Extremely Heavy When Lifted Manually

A garage door without functioning springs feels like dead weight — because it is. The springs counterbalance the door's full weight (150–400 pounds depending on door size and material), making it feel like it weighs only 10–15 pounds when properly balanced. If you disconnect the opener and try to lift the door manually and it feels impossibly heavy, that counterbalance force is gone — a spring has broken. Do not try to force the door open; the weight can cause serious injury if it slips.

3. The Door Only Opens 6 Inches Before Stopping

Most modern garage door openers have a built-in safety feature that detects unusual resistance and stops the motor after just 6 inches of travel. When a spring breaks, the opener suddenly has to lift the full weight of the door — which far exceeds its design load. The opener's torque limiter activates, stopping movement and often reversing the door back down. This is your opener protecting itself from motor burnout. If you see the door creep open 6 inches and stop, do not press the button again — you're risking stripping the opener's gears.

4. There's a Visible Gap in the Torsion Spring Coil

A torsion spring that has broken will show a visible separation in its coil — a gap of 1–3 inches where the metal has pulled apart. Look at the horizontal spring mounted above the garage door (when the door is closed) — it should be a continuous, tightly wound coil from one end to the other. A gap anywhere along that coil is definitive proof the spring has snapped. This visual check is the fastest and most certain way to confirm spring failure when you haven't heard a loud bang.

5. The Door Hangs at an Uneven Angle

A door that hangs lower on one side than the other indicates a spring or cable failure on that side. Most residential garage doors use a single torsion spring centered above the door, but two-car doors sometimes use two springs — one per side. If one spring breaks, the corresponding cable goes slack, and the door hangs crooked. Extension spring systems (the older style with springs running along the ceiling tracks) will show the same uneven hang when one extension spring fails. An uneven door that continues to move will bind in the tracks and risk falling.

What Should You Do If You Suspect a Broken Spring?

If you suspect a broken garage door spring, the most important thing is to stop using the door immediately and call a professional. Here is exactly what to do — and what not to do:

Do not try to open the door:

• The door is 150–400 pounds of dead weight with no counterbalance
• A door that slips can fall suddenly and crush anything underneath it
• Even a "successful" manual lift creates injury risk every time

Do not try to operate the garage door opener:

• Forcing the opener to lift a spring-less door strips the plastic drive gears
• Stripped gears turn a $200–$400 spring repair into a $400–$600 repair plus opener gear replacement
• Repeated attempts can burn out the opener's motor entirely

Call a professional immediately:

• State Line Door & Lift provides same-day spring replacement throughout Kansas City — call 816-616-8352
• Most spring repairs are completed in 45–90 minutes on a single visit
• No emergency fees — same pricing evenings and weekends

Temporary security while waiting:

• If the door is closed, leave it closed — it's acting as a physical barrier
• Lock the door from the inside using the manual slide lock if accessible
• If the door is stuck open, secure the garage from the interior and lock any door leading into the house
• Do not leave vehicles or valuables in an unsecured open garage overnight

How Much Does Garage Door Spring Replacement Cost in Kansas City?

Garage door spring replacement in Kansas City costs $200–$400 for a standard torsion spring pair, with pricing varying based on spring type, size, and whether you upgrade to high-cycle springs. Here is a breakdown of current pricing:

Why both springs should be replaced at once: Springs are sold in matched pairs and wear at the same rate. If one spring has broken after 7–10 years, the other is statistically weeks to months from failure. Replacing both at the same visit adds only $50–$100 in parts but saves you the full cost of a second service call — typically $120–$200 in additional labor. Any reputable technician will recommend replacing both.

How Long Does Garage Door Spring Replacement Take?

Garage door spring replacement takes 45–90 minutes for a professional technician on a standard residential door. The time variation depends on spring type, door size, and whether cables or other components also need attention.

The process involves: releasing tension from the old springs (if any remains), removing the broken spring(s), installing the new springs, winding the springs to the correct tension (which requires precise calculation based on door weight), reconnecting the cables and drums, testing balance with the opener disconnected, and verifying smooth operation. A technician who rushes this process — particularly the tension winding step — creates a safety hazard. Plan for a 90-minute window.

At State Line Door & Lift, most spring replacement calls are completed same-day. Calls received before 2pm are typically finished that afternoon. Text or call 816-616-8352 to schedule.

Can You Prevent Garage Door Spring Failure?

You cannot fully prevent garage door spring failure — springs have a finite cycle rating and will eventually break. However, you can extend spring life significantly and eliminate premature failures with these steps:

Annual professional maintenance:

• A professional tune-up includes tension adjustment, which ensures the door stays balanced and springs aren't overworked
• An unbalanced door can reduce spring life by 1–3 years
• Technicians also identify springs showing early signs of wear before they break

Upgrade to high-cycle springs:

• Standard springs are rated for 10,000 cycles (~7 years); high-cycle springs handle 25,000–50,000 cycles (15–25 years)
• The upfront cost is $100–$200 more, but the per-cycle cost is lower and you eliminate multiple replacement visits over your door's lifetime
• Learn more about our spring replacement options

Lubrication every 6 months:

• Apply silicone-based spray along the spring coils (never WD-40)
• Lubrication reduces friction that accelerates metal fatigue
• A light coat on the coils every spring and fall is sufficient