2026-04-20 7 min read
If you've ever walked into your garage on a hot Glendora morning, hit the button, and watched the opener motor strain and groan while the door barely budges. there's a good chance your springs are on their last legs. It's one of the most common calls we get here in the San Gabriel Valley, and it's almost always preceded by weeks of smaller warning signs that homeowners overlook.
Glendora's climate is harder on garage door hardware than most people realize. Summers regularly push into the low-to-mid 90s, with heat radiating off driveways and into attached garages for months on end. That sustained thermal stress accelerates the fatigue cycle on torsion and extension springs alike. If your home is one of the many ranch-style or mid-century homes that make up so much of Glendora's housing stock. especially in the areas south of the South Hills or along the older grid streets near Glendora Village. there's a decent chance your springs are the originals, installed decades ago.
Most residential garage doors use one of two spring systems. Torsion springs mount horizontally above the door opening and coil around a metal rod, storing energy as the door closes and releasing it to help lift the door. Extension springs run along the sides of the tracks and stretch when the door lowers, snapping back to assist on the way up.
Torsion springs are the more common and safer option on newer doors. They're also more expensive to replace. but they last longer and are less likely to cause injury if they break. Extension springs, found on many older Glendora homes, can snap with considerable force if they let go without a safety cable in place.
Either way, both types are under enormous tension at all times. That's what makes them so effective. and so dangerous to touch without proper training and tools.
Don't wait for a complete failure. Here's what to watch for:
If one side of your door rises faster than the other, or the door shudders and jolts on the way up, your springs have likely lost balanced tension. This can also stress your opener motor and cables.
A broken spring often announces itself with a sharp, loud crack. sometimes loud enough to startle you from inside the house. If you hear that sound and your door suddenly won't open, call for service before attempting to operate the door manually.
For torsion springs, healthy coils sit flush against each other. Visible gaps between coils are a clear sign the spring has broken and needs immediate replacement. Don't ignore this.
Your opener motor is designed to assist a balanced door. not to carry the full weight alone. If the motor is running but the door won't rise past a few inches, the springs are likely not providing the counterbalance they should. Continuing to run the opener in this state can burn out the motor.
While Glendora isn't a coastal city, garages can still trap humidity. especially during our brief winter rainy season. Rust weakens the spring's metal structure, making it prone to sudden failure. You can extend spring life by lightly lubricating them once or twice a year with a silicone or lithium-based lubricant, which is covered in detail in The Complete Garage Door Maintenance Guide for Homeowners.
For the Los Angeles County region. which includes Glendora and neighboring cities like San Dimas and Azusa. expect to pay in the range of $200 to $700 for a single spring replacement, with dual-spring jobs running higher depending on spring type and door weight. Torsion springs generally cost more than extension springs but offer a longer lifespan and safer operation.
A few things that affect your final price:
- Spring type: Torsion springs cost more than extension springs, but last 7,14 years and are safer overall - Door weight: Heavier doors. like the solid wood carriage-style doors found on some of the larger North Glendora and Morgan Ranch estates. require springs rated for more weight, which costs more - Replacing one vs. both: Even if only one spring has broken, most experienced technicians recommend replacing both at the same time. Springs wear at similar rates, so if one has failed, the second is usually not far behind. Replacing them together during a single visit saves on a second service call - Emergency or after-hours service: If your spring breaks at 6 a.m. on a Tuesday and your car is trapped inside, same-day emergency service will cost more than a scheduled appointment
It's worth noting that attempting to cut costs by doing this repair yourself is genuinely dangerous. Garage door springs are under extreme tension, and a spring that releases unexpectedly during installation can cause serious injury or structural damage to your door system. This is a job for a trained technician with the right winding tools. You can learn more about the safety risks involved on our garage door spring safety page.
If your door panels are still in good shape and the tracks, cables, and opener are functioning properly, spring replacement is almost always the right call. It costs a fraction of a full door replacement.
That said, if your door is 15,20 years old and you're also dealing with damaged panels, worn rollers, or an aging opener, it may make sense to evaluate the whole system. Our team at Garage Door Company Glendora can walk you through the numbers honestly. sometimes a repair makes sense, and sometimes the math points toward a new door. You can explore your options by visiting our services page or reaching out directly for a quote.
Q: How long do garage door springs typically last in Glendora? A: Most torsion springs are rated for 10,000 cycles. roughly 7 to 10 years for a household that opens the garage twice a day. Higher-cycle springs rated at 25,000+ cycles are available and make more sense if you use your garage as a primary entrance multiple times daily. Glendora's summer heat can accelerate wear, so regular inspections matter.
Q: Can I manually open my garage door if a spring breaks? A: Technically yes, but it's not advisable without help. Without a functioning spring, your door loses its counterbalance and can weigh well over 100 pounds. Attempting to lift it alone risks injury and can damage the door, cables, and opener. It's safer to call a technician and leave the door in place until it's repaired.
Q: How do I know if I have torsion or extension springs? A: Look above your garage door when it's closed. If you see a single spring (or two springs side by side) mounted horizontally on a metal bar directly above the door opening, those are torsion springs. If you see springs running horizontally along the left and right side tracks, those are extension springs. If you're still unsure, a quick photo sent to our team will tell you everything you need to know.