Garage Door Spring Repair in Santa Monica

Springs are the most important moving parts in a garage door. They are also the parts most likely to fail. Every time the door goes up or down, the springs wind and unwind under heavy load. Steel wire that flexes thousands of times will eventually fatigue and break. It is not a question of whether a spring will fail. It is a question of when.

This guide explains how springs work, how to know when one has failed, what causes failure, how we replace them, and what to expect. It also covers the special conditions of Santa Monica's coastal air. If your door has just made a loud bang, read the safety section first, then call.

How garage door springs work

A garage door can weigh from around one hundred pounds to several hundred pounds, depending on size and materials. No person and no small motor should be lifting that weight on every cycle. Springs do that work.

Torsion springs

Most modern residential doors use torsion springs. These are tightly wound steel coils on a metal shaft above the door opening. When the door closes, cables pull on drums at the ends of the shaft and wind the springs tighter. That stores energy. When the door opens, the springs unwind and release the energy, and they lift most of the door's weight. The opener then only has to guide the door and finish the travel.

Torsion systems have one spring on a single-car door or two on a wide or heavy door. The two springs share the load. If one breaks, the other is carrying more than it was designed for and is usually close behind.

Extension springs

Extension springs run parallel to the horizontal track on each side of the door. They stretch as the door closes and contract as it opens. They are common on older or lighter doors. They are usually paired with safety cables that run through the center of each spring. If an extension spring breaks without a safety cable, the pieces can whip through the garage.

Why balance matters

When springs are matched correctly, the door is balanced. It stays in place when raised halfway. The opener does little work. When springs are too weak, the door feels heavy and the opener strains. When they are too strong, the door can shoot up or refuse to stay closed. Correct balance is the real goal of any spring repair.

Signs of a broken or failing spring

Some signs are dramatic. Others are quiet warnings.

Signs of a broken spring

• A loud bang from the garage, like a gunshot or a heavy object dropped.
• A visible gap in the coil of the torsion spring above the door.
• A door that will not lift or lifts only a few inches.
• An opener that hums or strains but does not move the door.
• A door that feels far heavier than usual when raised by the release cord.
• A door that slams down when you release it partway up.
• A cable that is loose or hanging slack near the bottom corner.

Signs a spring is wearing out

• A door that is slower than usual or moves in a jerky way.
• Rust on the coils, especially in the grooves.
• A door that drifts up or down when stopped halfway.
• Squeaks or pops from the coils as they wind.
• An opener that runs louder or labors on the way up.

If you see wear signs, plan the repair. A spring that is near the end of its life does not fail politely. It fails when you are late for work.

Safety first: what not to do

Many injuries happen when people try to lift the door to get a car out. A door that has lost its springs will feel heavy but may still move. When it slips, it drops with the full force of its weight. Do not try this alone.

If you must get a car out, call us first and describe the situation. Some doors can be raised safely by two adults using the manual release and by propping in the fully open position with clamps, but only if the technician agrees. We would rather explain the risk than have you take it.

Do not run the opener after a spring breaks. The opener is not built to lift the door alone. Repeated attempts can strip the gears or burn out the motor. That turns a spring repair into a spring and opener repair.

Why garage door springs break

Springs do not break at random. A few clear causes account for most failures.

Cycle fatigue

Each spring is built for a number of open-and-close cycles. Standard residential springs are commonly rated around 10,000 cycles. Higher-cycle springs are available with longer ratings. A household that uses the door four times a day reaches 10,000 cycles in about seven years. A household that uses it eight times a day reaches it in about three and a half. This is why a door that seems fairly new can need springs sooner than expected.

Rust and corrosion

Rust pits the surface of the wire and weakens it. In a coastal city like Santa Monica, salt and morning moisture speed the process. Springs near the beach can show surface rust while the rest of the door looks fine. A rusty spring also binds against itself, which adds stress.

Lack of lubrication

Coils rub against each other as they wind. Dry coils create friction and heat. Regular lubrication with a product made for garage door springs reduces that wear. See the maintenance guide.

Wrong or mismatched springs

A spring that is too weak for the door works harder and breaks sooner. Doors get heavier when owners add insulation, windows or wood-look panels. If a door changed weight and the springs did not, the springs will suffer.

Imbalance elsewhere in the system

A door with dry rollers, bent tracks or a worn cable makes the springs work harder. That is why we check the whole system, not only the spring.

How we repair and replace garage door springs

A spring repair is a controlled, step-by-step job. Here is what happens.

1. Inspection. We look at the door, the broken spring, the cables, the drums, the rollers, the tracks and the opener.
2. Measurement. We measure the door's height and weight. We measure the spring's wire diameter, inside diameter and length, and note whether it is left- or right-wound.
3. Selection. We choose a spring that matches those measurements and the door's weight. If you want a longer-life spring, we explain the options.
4. Safe unloading. We secure the door so it cannot fall and relieve the remaining tension with proper winding bars.
5. Replacement. We remove the broken spring and fit the new one on the shaft, along with any needed hardware.
6. Winding. We wind the new spring the right number of turns for the door height. This sets the lifting force.
7. Balance test. We disconnect the opener and lift the door halfway. It should stay in place. If it drifts, we adjust the tension.
8. Full-system check. We inspect cables, drums, rollers and tracks for damage caused by the spring failure.
9. Opener and safety test. We reconnect the opener, check limits and force, and test the auto-reverse and sensors.

You receive a free written quote before any of this begins. The quote lists the spring type, the labor and any other parts that need replacing.

Should you replace both torsion springs?

If your door has two torsion springs and one breaks, replacing both is the standard advice. The reasoning is simple. Springs installed together at the same time wear at almost the same rate. If one has failed, the other is near the end of its life and has been carrying extra load. Replacing only the broken one saves a little money today and often leads to a second call soon after.

The two springs also need to be matched so the door lifts evenly. A new spring beside an old one can leave the door slightly out of balance. Replacing both gives the most even performance.

Published cost guides reflect this. A 2026 HomeGuide article gives $150 to $350 for replacing both top-mounted torsion springs and $120 to $200 for a pair of side-mounted extension springs. Heavier insulated doors and double doors may need additional or stronger springs. Those are published averages, not our quotes. You can read more on the cost guide.

Standard springs versus high-cycle springs

Springs are rated by cycle life. The rating tells you roughly how many open-and-close cycles the spring can perform before it is likely to fail.

If you use the door many times a day, high-cycle springs may save money over the years even though they cost more today. Tell us how often the door is used. We will explain whether the extra life is worth it for your household.

Torsion or extension: should you convert?

Some older Santa Monica homes have extension springs on lighter doors. Torsion systems are generally considered safer because the spring is contained on a shaft and the load is smoother. They can also make the door run more evenly. Converting an extension system to torsion requires new hardware, including a shaft, drums, bearing plates and cables. It costs more than a like-for-like replacement.

Conversion is worth considering if the extension springs have failed and the door is otherwise in good shape. It is also worth considering if the door has no safety cables. We give you both options and quote them in writing.

Spring problems that look like something else

A door that will not lift is not always a spring problem. A few other faults can look similar.

• A stripped opener gear. The motor runs but the door does not move, even after you disconnect the opener and lift the door by hand. If the door lifts easily by hand, the spring is probably fine and the opener is at fault. See opener repair.
• A snapped or slipped cable. The door hangs crooked. See cable and roller repair.
• A blocked or bent track. The door binds partway. This is a track issue.
• A sensor fault. The door goes up but will not close. The springs are not the cause.

We do not assume. We test and inspect before we quote.

Spring repair in Santa Monica homes

Santa Monica has a wide mix of doors, and springs need to match each one.

Older doors on older homes

Some garages date from the 1920s through the 1940s, which is when many original houses in areas like Sunset Park were built. Many of those garages have since been rebuilt or fitted with modern doors. A door that has been replaced and repaired over the years may have springs that do not match its current weight. A quick check of the balance tells us if the springs were ever right.

Heavy wood-look and custom doors

Larger homes, such as many in the North of Montana area, often have wider doors with wood or wood-look panels. These are heavier than a standard steel door and need stronger springs. Never assume a spring from a standard door will fit.

Full-view glass and insulated doors

Modern doors with large glass panels or thick insulation weigh more or less than they appear. The spring needs to be chosen for the actual weight of the door as built.

Shared and multi-unit garages

A door that is used constantly by many residents will burn through cycles fast. High-cycle springs are worth considering. See our commercial and multi-unit page.

Coastal conditions

Salt and moisture near the coast speed rust on unprotected steel. We look for surface rust on the coils and note it on the quote. Regular lubrication and, when replacing, corrosion-resistant hardware can help.

What a spring repair means for the rest of the door

A snapped spring often causes secondary damage. The sudden release can shift the shaft, loosen the drums or shake the door hard enough to jump a roller. That is why the inspection after a spring failure matters.

We check the cable ends and drum grooves for damage. We check the shaft for straightness. We check the center bearing and end bearing plates for wear. We check that the top brackets are secure. If something else has been hurt, we tell you and quote it separately.

We also test the opener. An opener that struggled to lift a door with a broken spring may have suffered strain. If it now runs well, we leave it. If it shows damage, we explain what is needed.

After your new springs are in

New springs should give you smooth, quiet operation. Some simple habits help them last.

• Lubricate the coils every six months with a product made for garage door springs.
• Test the balance twice a year. Disconnect the opener with the door closed and lift it halfway. It should stay.
• Do not overload the door with added weight, such as a heavy decorative overlay.
• Watch for surface rust and address it early.
• Note the date of the repair so you know when the springs are due to be inspected.

Understanding spring measurements

Springs are not one size fits all. When a technician measures a torsion spring, four numbers matter. Together they decide how much lifting force the spring gives.

• Wire diameter. The thickness of the steel wire. Even a small change in thickness changes the strength a lot. Technicians measure a run of coils and divide to get an exact size.
• Inside diameter. The width of the opening in the middle of the coil. Common sizes are quite standard, but they must match the shaft and the winding cone.
• Length. The unstretched length of the spring. Longer springs turn more and give a smoother lift.
• Wind direction. Springs are wound left or right. The pair on a two-spring door are opposite, and they must be installed on the correct side.

The door's weight and height decide which combination works. A technician can weigh the door with a scale on the bottom edge. That is more reliable than guessing from a chart. It also explains why a spring from a hardware store often fails to balance a door. It matched a generic door, not yours.

Ask to see the old and new spring side by side. If the sizes look different, ask why. There may be a good reason, such as an upgrade to high-cycle springs. There may also be a mistake.

Frequently asked questions about garage door spring repair