2026-04-19 7 min read
If you've ever walked into your garage in the morning and found the door completely dead. opener running, nothing moving. there's a good chance a spring has snapped. It's one of the most common calls we get here in San Marcos, and it almost always happens at the worst possible time: before work, during a summer thunderstorm, or right before a long weekend.
Springs are the unsung workhorse of your garage door system. They do the actual heavy lifting, counterbalancing a door that can weigh anywhere from 150 to 400 pounds. When one fails, the opener alone simply can't do the job. Understanding what springs do, how San Marcos conditions affect them, and what replacement actually involves can save you from a bad DIY decision. or from being overcharged by someone who sees a homeowner in a pinch.
San Marcos sits in a unique geographic position between Austin and San Antonio, which means it catches the full force of Central Texas summers. Temperatures regularly push past 100°F, and the humidity rolling off the Blanco River and the San Marcos River corridor adds another layer of stress to metal components.
Heat matters for springs because metal expands under high temperatures and contracts when a cold front rolls through. and Central Texas gets both. That constant thermal cycling causes metal fatigue over time, slowly weakening the coil. The Texas heat can reduce spring lifespan by 20 to 30 percent compared to more moderate climates. A standard residential spring rated for 7,000 to 10,000 cycles might only reach 6,000 before showing signs of failure in our climate.
Homeowners in neighborhoods like Blanco Gardens, Willow Creek, and Sunset Acres. areas with a good mix of older builds and newer construction. often find their springs wearing out faster than the manufacturer estimates because of this. It's not a defective spring; it's just Central Texas doing what it does.
There are two main spring types you'll encounter in San Marcos homes:
Torsion springs mount horizontally above the door opening. When the door closes, the spring twists to store energy, then releases it when the door opens. Most newer homes. including the builds going up along Hunter Road and out in developments off Wonder World Drive. are set up with torsion systems. They're smoother, last longer, and are generally considered safer.
Extension springs run parallel to the horizontal tracks on each side of the door. They stretch as the door lowers and contract as it rises. You'll see these more often in older homes near downtown San Marcos or around the Dunbar neighborhood, where garages were built with lower ceilings that didn't always accommodate a torsion setup. If you have extension springs, make sure safety cables are installed through them. if a spring snaps, the cable keeps it from becoming a dangerous projectile.
For a deeper look at how your overall garage door system works together, check out our complete guide to garage door maintenance.
Springs rarely snap without warning. Here's what to watch for:
1. The door feels unusually heavy. Disconnect the opener and try lifting the door manually. A properly balanced door should lift with one hand and stay at about waist height on its own. If it's hard to lift or crashes down, the spring tension is off. 2. The door opens unevenly. One side rises faster than the other, causing a visible tilt. This usually means one spring in a two-spring system is weaker than the other. 3. You hear a loud bang from the garage. A snapping torsion spring sounds like a gunshot. Many homeowners first think someone hit their car. 4. There's a visible gap in the spring coil. Torsion springs with a break will show a clear separation in the coil. you can spot it by looking above the door. 5. The opener strains or reverses immediately. If your opener starts to lift the door then quits or reverses, it may be detecting that the spring isn't doing its job.
If you're seeing any of these alongside other issues like grinding or sensor problems, it's worth reviewing these warning signs your garage door needs professional repair before the problem compounds.
This is one of the most common questions we hear. If you have a two-spring system and one breaks, the temptation is to replace only the failed spring. The honest answer: replace both.
Here's why. Both springs were installed at the same time and have experienced the same number of cycles and the same heat exposure. If one has worn to the point of failure, the other is right behind it. Replacing just one means you'll likely be calling for service again within months. and the labor cost is the same either way. It's one of those situations where spending a little more now is the genuinely smarter move.
Torsion springs are under extreme tension. enough force to cause serious injury or death if handled improperly. This isn't fine-print caution; it's a real risk. The tools required (winding bars, the correct spring size matched to your door's exact weight) aren't things most homeowners have sitting around, and using the wrong spring size will throw off the balance of your door and stress your opener motor.
Professional spring replacement typically takes under an hour. A good technician will also check cable condition, inspect the drums and bottom brackets, and test the door balance before leaving. That full inspection is part of what you're paying for. You can explore all the ways Garage Door San Marcos handles spring work and related repairs on our services page.
Pricing varies based on spring type, spring size (which is determined by your door's weight and height), and whether you're replacing one or two. Generally, expect:
- Extension spring replacement (per spring): $75,$150 including labor - Torsion spring replacement (single): $150,$250 including labor - Torsion spring replacement (pair): $200,$350 including labor
Higher-cycle springs. rated for 25,000+ cycles. cost more upfront but make sense for busy households or anyone who doesn't want to deal with this again for many years. Given how hard our San Marcos climate is on standard springs, upgrading to a higher-cycle option is worth considering.
Ready to get your spring looked at or replaced? Schedule a visit with our team and we'll give you a straight answer on what needs to be done. no upselling, no surprises.
Standard springs are rated for 7,000 to 10,000 cycles under normal conditions, but the Central Texas heat and humidity can shorten that lifespan by 20,30%. Most households in San Marcos see spring failures somewhere between 5 and 8 years of regular use. Higher-cycle springs can push that well past a decade.
Technically the door can still move manually, but it will be extremely heavy. potentially 150 to 400 pounds depending on door size and material. Operating the door this way risks damaging the opener motor and cables. It's best to leave the door in the closed position and call for service rather than force it.
If budget is a genuine constraint, replacing one spring will get your door working again. But if both springs were installed at the same time, the remaining spring is likely near the end of its life too. Most experienced technicians will recommend replacing both to avoid a second service call within a short window.