2026-10-13

How to Tell If Your Garage Door Spring Is Broken

A broken spring is the most common reason a garage door suddenly refuses to open, and the most dangerous part of the door to misunderstand. Here are the telltale signs, what is actually happening inside your door, and the one rule that matters more than all of them: do not try to fix it yourself.

The Loud Bang That Starts It All

A torsion spring snapping sounds like a gunshot or a firecracker going off inside the garage. Many homeowners are convinced something exploded, or that a car hit the house. What actually happened is metal fatigue reaching its endpoint. A standard torsion spring is rated for around ten thousand open and close cycles, which works out to roughly seven years of twice-daily use, and when the steel finally lets go it usually happens with the door closed, when the spring is under maximum tension. Florida shortens that lifespan. Humidity and salt air corrode the steel, and every rust pit becomes a microscopic stress fracture. Within a few miles of the coast, springs fail noticeably earlier than their rated cycle life, and we see the pattern constantly in Broward County. If you hear that bang, go look, but do not touch anything. Check whether the door still responds to the opener, and note what you see, because you are about to need a technician, not a toolbox.

The Door Won't Open, Or Only Moves a Few Inches

This is the classic service call: the opener runs, strains, and the door barely moves. With a broken torsion spring, the opener is suddenly trying to lift the door's full dead weight, anywhere from 150 to well over 300 pounds depending on size and material, instead of the balanced ten to fifteen pounds it was designed for. The door may lift a few inches and stall, or the opener's force sensor may reverse it right back down. Doors with extension springs, the older style mounted horizontally above the side tracks, may open crooked or jerk sideways. Here is the expensive mistake to avoid: every extra press of the button risks burning out the opener motor or stripping the nylon drive gear inside the motor head. That turns a spring replacement, which starts from $155, into a spring plus opener job, with opener installation starting from $425. If the door moves a few inches and quits, stop pressing the button. You have your diagnosis, and further attempts only add damage.

The Door Suddenly Feels Impossibly Heavy

A healthy, balanced garage door lifts with one hand. A door with a broken spring feels like dead weight, because it is. You are lifting the entire door with no counterbalance help at all. There is a safe ten-second test that confirms spring failure. With the door fully closed, pull the red emergency release cord to disconnect the opener, then try lifting the door manually. If it takes serious muscle, slams back down when you let go, or refuses to stay at the halfway point, the springs are not doing their job. Keep your hands and feet completely clear of the door's path during this test, and never stand under a partially open unbalanced door. If it starts to slam, let it go. Do not try to catch a falling two-hundred-pound door with your hands or your back. This is the same test a technician runs on arrival, and it tells the whole story immediately.

A Visible Gap in the Spring

Once you know what to look for, a broken torsion spring is unmistakable. Stand back from the door, with it closed, and look at the spring bar mounted above the opening. A snapped torsion spring shows a clean two to four inch gap where the coil separated. You may also see stretched or distorted coils near the break and rust flaking off the steel. Extension springs run horizontally above the side tracks on each side of the door. A broken one hangs loose, stretches out limp, or dangles, hopefully caught by its safety cable. If your door has extension springs without safety cables, mention it when you call, because we install them as part of the repair. They are cheap insurance against a whipping spring. Look, confirm, and step back. Do not poke the spring, pull on it, or test its tension. The broken half can still hold force, and on a two-spring door the intact spring is still fully loaded and just as dangerous as ever.

The Opener Strains, Hums, or Gives Up

An opener fighting a broken spring shows very specific distress signals. The motor hums without moving the door. The door creeps upward at a crawl. The opener starts, then reverses or shuts off. In the worst case you smell hot electrical windings from the motor head. Openers are engineered to move a balanced door, not to deadlift hundreds of pounds, and the weakest link is almost always the nylon drive gear inside the unit. Pop your head under the motor and look at the floor: white plastic shavings directly beneath it mean the gear teeth have stripped. A stripped gear means the opener needs internal repair or replacement even after the new spring goes on, because the damage is already done. The rule is simple. The moment you suspect a broken spring, unplug the opener or at minimum stop using it. One more hopeful button press is very often the one that kills a perfectly good opener, and that is a repair bill you did not need.

Why You Must Never Replace a Spring Yourself

This deserves blunt talk, because spring injuries send DIYers to the emergency room every year. A wound torsion spring stores hundreds of pounds of rotational force in coiled steel. Replacing one requires winding bars seated fully and squarely into the winding cone, a rock-stable ladder, and exact spring sizing. Wire gauge, coil length, inside diameter, and wind direction must all match your door's weight and height. Springs are color-coded for exactly this reason, and the wrong spring over-lifts or under-lifts the door, which destroys the opener or slams the door without warning. Winding bars slip. Ladders shift. A slipped bar becomes a projectile, and a released spring whips with enough force to break bones. Extension springs look simpler but snap back violently when they let go, which is why safety cables exist. Online videos make the job look like a twenty-minute task because the person filming got lucky. We carry the common spring sizes on the truck, and most replacements are finished in under an hour, with the door properly rebalanced, tested, and safe. There is no savings worth the risk.

What to Do Right Now

Do not force the door and do not keep running the opener. Those are the two rules until a technician arrives. If your car is trapped inside the garage, there is a safe workaround. With the door closed, disconnect the opener with the red cord. Then, with two people lifting evenly from both sides, raise the door together, keeping your backs straight and lifting with your legs. Once it is open, clamp a pair of locking pliers or a C-clamp onto the track just below a roller to hold it in place. Never trust your grip, and never prop it with a broomstick. Get the car out, lower the door back down, and leave it closed and the house secured until the repair is done. Then call for same-day spring replacement anywhere in Broward County. We stock the common torsion and extension spring sizes on the truck, so most jobs are completed in a single visit, and you approve a firm upfront price starting from $155 before any work begins. Call OM Garage Door Florida at (954) 673-1101. We answer 24/7, including weekends and holidays.