2026-04-04 7 min read
It usually happens first thing in the morning. You press the button, hear a loud bang or a grinding strain from the opener motor, and the door barely moves. Nine times out of ten, that's a broken spring. It's one of the most common garage door repairs in Redwood City, and it's also one of the most misunderstood. both in terms of how dangerous the repair can be if done wrong, and what it actually costs to fix it properly.
If you're dealing with this right now, here's a straightforward breakdown of everything you need to know.
Most residential garage doors use one of two spring systems. Torsion springs sit horizontally above the door opening on a metal shaft. They wind and unwind to counterbalance the door's weight as it moves up and down. Extension springs run along the horizontal tracks on either side of the door and stretch under tension to do the same job.
The reason springs wear out isn't mysterious. it's pure physics. Every time you open or close your garage door, the spring completes one cycle. Standard springs are typically rated for around 10,000 cycles. If your household uses the garage door four to six times a day (a realistic number for a family that uses the garage as its main entry point), you're looking at roughly 1,500 to 2,000 cycles per year. Do the math and that's a 5-to-7-year lifespan for a standard spring.
In Redwood City and across the Peninsula, Bay Area moisture adds another variable. Morning fog and overnight condensation settle on spring coils, and the daily wet-dry cycle promotes rust that weakens the metal over time. shortening that lifespan further if the springs aren't kept lubricated. Homes in Redwood Shores near the Bay, or properties on lower-elevation streets closer to the water, tend to see hardware wear a bit faster for this reason.
A spring doesn't always fail dramatically. Sometimes it gives warning signs first:
- The door is slow or jerky going up. The opener is working harder than it should because the spring isn't providing full counterbalance. - The door only opens a few inches and stops. Many modern openers have a safety feature that halts operation when spring tension is lost. - The door looks uneven or tilted when open. On systems with two springs, if one breaks, the door can hang crooked. - You see a gap in the spring coil. A visible separation in the coil is a clear sign of a broken torsion spring. - The door feels extremely heavy when lifted manually. A properly balanced door should hold its position at mid-height. If it crashes down, the spring tension is gone.
If you notice any of these, it's time to stop using the door and get in touch with a technician before the opener motor burns out trying to compensate.
You can also cross-reference these symptoms with our overview of garage door repair warning signs to help you assess the situation before you call.
Here's honest pricing. In California, torsion spring replacement typically runs $200 to $500 for a single spring, including parts and labor. Extension springs are more affordable, usually $120 to $200 per spring. Bay Area labor rates are on the higher end of national ranges, so budget closer to the top of those windows.
A few things influence the total:
- Spring type. Torsion springs cost more but last longer and are the safer, more reliable option for most homes. - One spring or two. If you have a two-spring system and one breaks, it's almost always worth replacing both at the same time. The second spring has the same wear history as the first and will likely fail soon after. Replacing both in one visit saves a second service call fee. - Spring cycle rating. Standard springs are rated at 10,000 cycles. High-cycle springs, rated at 25,000 cycles or more, cost more upfront but can nearly triple the lifespan. For Redwood City homeowners who use the garage constantly, high-cycle springs are genuinely worth the investment. - Door size and weight. Larger or heavier doors. including many insulated double doors common in newer Peninsula homes. require heavier-duty springs that carry a higher price tag.
Garage Door Redwood City provides upfront quotes before any work begins. You can review the full scope of what we handle on our services page.
This is worth being direct about. Torsion springs are under extreme tension. enough to cause serious injury or death if they release suddenly during handling. This is not a liability disclaimer. It's just the reality of the physics involved. The tools required to safely wind and unwind these springs are specialized, and the technique has to be precise.
Extension springs carry similar risks. They're stretched under high tension and, if they snap during improper handling, they can act like a whip. Even experienced homeowners who are comfortable with most repairs should leave this one to a trained technician.
The cost of a professional spring replacement is genuinely reasonable. and it's a fraction of what you'd spend on an ER visit or a replacement opener motor that burned out trying to drag a door with no spring tension.
Once you've had springs replaced, a few habits will extend their life:
- Lubricate the springs every six months with a silicone or white lithium grease. Spray directly on the coils. This reduces friction and slows the rust that the Bay Area's marine air promotes. - Don't slam the door. Letting the door crash shut adds unnecessary stress to the springs on every cycle. - Balance test once a year. Disconnect the opener (pull the red cord), lift the door manually to waist height, and let go. It should stay put. If it drops or rises, the spring tension needs adjustment. - Ask about high-cycle upgrades when you're getting a replacement. The price difference is modest; the lifespan difference is significant.
For the full picture on keeping your system in shape between repairs, our maintenance tips post is a useful reference.
Q: Can I still use my garage door with a broken spring? A: Technically, some openers will still try to move the door. but you shouldn't let them. Operating a door without proper spring tension puts severe strain on the opener motor and can damage the door panels, cables, and opener itself. It's also a safety risk if the door drops unexpectedly. Stop using it and call for service.
Q: Should I replace both springs even if only one broke? A: Yes, in almost every case. Both springs have the same number of cycles and the same exposure history. If one broke, the other is close behind. Replacing both in a single visit costs less than two separate service calls, and it keeps your door balanced and operating safely.
Q: How do I know if I have torsion springs or extension springs? A: Torsion springs are the large, tightly coiled spring (or pair of springs) mounted horizontally above the garage door opening on a metal bar. Extension springs are the longer, thinner springs that run along the horizontal tracks on both sides of the door. If you're still not sure, a quick photo sent to a technician can settle it before you book a service call.