Do garage door springs weaken over time?

Yes, garage door springs absolutely weaken over time, even if they have not yet broken, due to metal fatigue, repeated cycling, rust, and loss of tension. Torsion springs and extension springs work by storing mechanical energy each time the door closes and releasing it to help lift the door. Every open and close cycle causes the steel coils to flex, and after thousands of cycles, typically around 10,000 for standard springs, the steel begins to fatigue, develop micro-cracks, and lose its ability to hold tension. This weakening shows up as the door feeling heavier to lift manually after pulling the emergency release, the door not staying open halfway when you test balance, or the opener struggling, humming, and opening the door only a few inches before stopping because the spring can no longer fully counterbalance the 150 to 300 pound door weight. Rust and corrosion from moisture, especially from overflowing gutters above the garage that drip water onto the springs, accelerates weakening by causing pitting. Lack of lubrication twice a year with silicone lubricant also increases friction and wear. Cold temperatures can make springs more brittle. Even if a spring looks intact, if it is 7 to 10 years old, it has weakened significantly and is close to breaking and should be inspected by a professional.