Heard a loud bang from the garage? A snapped spring is the most common — and most dangerous — garage door failure. Get matched with a local pro who replaces them safely.
Garage door springs do the actual lifting — the opener just guides the door. When a spring breaks, the door becomes a 150–300 lb dead weight, and the opener can burn out trying to move it. If you heard a sharp bang from the garage or the door now feels impossibly heavy, a broken spring is the likely cause.
Chattanooga's temperature swings — humid summers, winter freezes — fatigue springs faster than milder climates. Most residential torsion springs are rated for about 10,000 cycles, which works out to roughly 7–10 years of typical use. Homes where the garage is the main entrance hit that limit sooner.
Most newer homes in Ooltewah and East Brainerd have a single or paired torsion spring mounted on a shaft above the door — the safer, longer-lived design. Older homes, especially around St. Elmo and the North Shore, often still run extension springs stretched along the horizontal tracks. Extension springs are cheaper but more hazardous when they snap, since they can whip unless a safety cable is installed through them — if yours lacks safety cables, that's worth fixing regardless of the spring's condition.
Spring replacement is a same-visit job: the tech measures the door's weight and drum size, fits the correct springs (matched in pairs on two-spring systems — replacing only one leaves an old spring doing the same work and weeks from failing itself), then rebalances the door so it holds position at half-open. The whole visit typically runs about an hour, and most Chattanooga-area jobs land in the $200–$400 range depending on door weight and whether one or two springs are fitted.
Do not try to replace a spring yourself. Torsion springs store enough energy to cause serious injury, and this is the one garage door repair that is genuinely dangerous as a DIY job. The technicians we match you with carry the correct spring sizes on the truck.
Two habits meaningfully extend spring life in this climate. First, lubricate the springs, rollers, and hinges with a silicone or garage-door-specific spray twice a year — spring and fall — to keep Tennessee Valley humidity from pitting the coils. Second, run an occasional balance test: pull the red release cord with the door closed, lift the door halfway by hand, and let go. A balanced door holds position; one that slams or drifts up means the springs need adjustment before they fail. If the door won't stay halfway, that's also your early warning that spring tension is fading — a much cheaper adjustment than an emergency replacement.
When you get your quote, ask about high-cycle springs: for a modest price difference they roughly double the expected lifespan, which is worth it in a household that uses the garage door as the front door.