Spring Repair

Garage door spring life is commonly described in operating cycles, with one cycle meaning one complete opening and closing. Actual service life depends heavily on the spring design, door setup, usage frequency, environment, and maintenance, so translating a cycle rating into a fixed number of years is not reliable. Higher-cycle spring options are available for doors that see frequent use. Cold weather, moisture, corrosion, spring condition, and usage can all affect wear over time. Regular maintenance and rust prevention can help reduce unnecessary wear. A spring that is well-lubricated every six months and protected from rust lasts meaningfully longer than one that is neglected and exposed to moisture, regardless of cycle count. In a two-spring system, both springs are installed at the same time and wear at essentially the same rate. When one breaks, the second is statistically very close to failure — which is why replacing both at the same time is almost always the right decision.

Springs will eventually reach the end of their mechanical life, but regular maintenance extends their useful lifespan noticeably. The most important step is lubrication: apply a lithium-based garage door lubricant — not WD-40, which evaporates quickly and leaves no protective film — to the spring coils every six months. Spring and fall are the logical times, particularly before Montreal's winter. Have a trained technician check spring balance as part of that same visit rather than testing it yourself. Addressing rust early — before it penetrates deeply into the coil surface — prevents the stress fractures that lead to sudden snapping. If the door ever starts feeling heavier than it used to during manual operation, that is an early warning sign of weakening springs, and a professional inspection is worth scheduling before a full failure occurs.

The most unmistakable sign is sound: a broken torsion spring snaps with a loud bang that most homeowners compare to a gunshot inside the garage. If you hear this, stop using the door immediately. After the snap, the visual indicators are clear: look for a visible gap in the coil of the spring — a break that separates the spring into two segments. The door will feel extremely heavy when you attempt to lift it manually with the opener disengaged. If the door was closed when the spring broke, the opener may attempt to lift it, travel two or three inches, then reverse or stop entirely — the opener's safety mechanism detects the excessive resistance. On a two-spring system, a broken spring often causes one side of the door to hang visibly lower than the other, because the counterbalance on that side is lost. In the weeks before a full break, you may notice the opener running slower than usual, a new grinding or creaking noise during operation, or the door moving unevenly or with a jerking motion along the tracks. Any of these are warning signs that a spring inspection is overdue.

Yes — and here is why this is almost always the right decision, not just a convenient upsell. In a two-spring garage door system, both springs are installed on the same day and go through every opening and closing cycle together. They accumulate wear at essentially the same rate. When one spring reaches the end of its life and breaks, the surviving spring has already completed the same number of cycles and is at the same point in its mechanical lifespan. Statistically, the second spring fails within weeks or months of the first. If you replace only the broken spring today, you are very likely scheduling a second emergency service call in the near future — paying another labor charge and again being without a working garage door at an inconvenient time. Replacing both springs during a single service visit is more cost-effective: the labor is already done, the door is already open and secured, and the technician is already on-site. Many households use this as an opportunity to upgrade to high-cycle springs, which last roughly twice as long and reduce the overall frequency of spring service over the life of the door.

Not safely, and we don't recommend it. With a broken spring, the door can become extremely heavy and unstable because the counterbalance system is no longer working normally. If you need a vehicle out before service, call us first for guidance; don't attempt to lift, secure, or move the door yourself. We prioritize emergency calls.

A torsion spring is a coiled steel spring mounted horizontally on a solid steel shaft directly above the garage door opening. In a standard residential installation, one or two of these springs sit centered above the door, attached to the shaft through spring anchors on either side. When the garage door closes, the cables wound around the drums on each end of the shaft pull downward and cause the shaft to rotate — winding the torsion spring and storing mechanical energy inside it. When the door opens, the spring unwinds and releases that stored energy, turning the shaft in reverse and pulling the cables upward, which lifts the door. The amount of energy stored — and therefore the lifting force provided — depends on the spring's wire diameter, coil diameter, length, and the number of winds applied during installation. Torsion springs have replaced extension springs as the standard in most residential installations over the past few decades because they are more durable, provide smoother and more controlled operation, and are safer to service — the shaft confines the spring so that if it breaks, it remains in place on the shaft rather than flying free.

Torsion springs are mounted on a horizontal shaft above the door opening and work by twisting — they store energy by winding up as the door closes and release it by unwinding as the door opens. Extension springs are mounted above the horizontal tracks on either side of the door and work by stretching — they extend as the door closes and retract as it opens. The key differences between the two systems come down to safety, reliability, and smoothness. A broken torsion spring stays on the shaft that runs through its center — it is physically constrained and cannot travel. A broken extension spring has nothing holding it in place and can snap with enough force to cause serious damage to vehicles, walls, or anyone nearby. Extension spring systems require safety cables threaded through the spring to contain it if it breaks. Torsion springs also provide a more balanced and even lift because the force is applied symmetrically from a single central shaft. Extension springs apply force from the sides, which can cause uneven wear on rollers and tracks over time. For these reasons, torsion springs are the standard for virtually all new residential installations today, and many older extension spring systems are upgraded to torsion when major service is required.

A door that becomes suddenly and noticeably heavier during manual operation — or that the opener can no longer lift reliably — has almost certainly lost part or all of its spring counterbalance. The spring's job is to offset the full weight of the door so that the opener only needs to provide directional movement. When the spring breaks or weakens significantly, the door's full weight is transferred directly to the opener and the cables. Don't try to confirm this yourself by lifting or releasing the door — stop using the opener and have a technician check the spring instead. Continuing to run the opener against that load causes motor burnout relatively quickly when a spring-damaged door is operated repeatedly.

An opener that strains, makes a grinding noise, moves the door only partway before stopping, or reverses immediately after starting upward is almost always dealing with a spring problem rather than a motor problem. Garage door openers are not designed to lift the door — they are designed to move an already-balanced door. The motor provides enough force to overcome friction and inertia, not to counterbalance the full weight of the door. When the spring fails, the opener is doing work it was never engineered for. The motor runs hotter than normal, the drive mechanism — whether belt, chain, or screw — operates under higher-than-designed stress, and the opener's built-in safety system, which detects excessive resistance and reverses the door, triggers repeatedly because the load exceeds the safety threshold. A useful diagnostic check: disconnect the opener using the emergency release and try operating the door manually. If the door opens easily by hand, the opener mechanism itself is fine — the spring is the problem. If you cannot open it by hand either, the spring is gone. Running the opener repeatedly when the spring is broken will burn out the motor, turning a spring repair into a combined spring and opener replacement.

Very cold weather can affect spring behavior and other moving components in a garage door system. Temperature, moisture, corrosion, spring condition, door balance, and usage can all influence wear, so no single temperature or time of day reliably predicts spring failure. At low temperatures, the steel coil has less elasticity, which means the stress of winding and unwinding is more concentrated in the coil. Standard lubricants also thicken significantly in cold weather, reducing their effectiveness at protecting the coil surfaces during those high-stress cold-weather cycles. Weatherstripping that has frozen or compressed against the ground overnight adds extra resistance at the very beginning of the opening cycle, placing the spring under a slightly higher load under colder operating conditions. A pre-winter inspection and lubrication with a low-temperature rated lubricant — ideally done in October before the first hard freeze — is one of the most effective maintenance steps for extending spring life through a Montreal winter. Upgrading to high-cycle springs with heavier wire gauge also helps, as thicker steel is meaningfully more resistant to cold-weather brittleness.

A standard residential torsion spring is under substantial tension and stores significant mechanical energy while the door is in the closed position. When a spring is wound during installation, each quarter turn adds a specific increment of tension determined by the spring's wire diameter, coil diameter, and length. A typical residential torsion spring requires 25 to 30 quarter turns to reach proper tension. The winding bars used during this process are typically 18 to 24 inches long specifically because they provide the mechanical leverage needed to add tension safely in controlled increments. If a spring releases unexpectedly during this process — due to a slipped bar, incorrect procedure, or improper tools — the stored energy releases instantly with force sufficient to break wrists, cause severe facial injuries, or send the winding bar flying at dangerous velocity across the garage. This is the reason spring replacement requires professional tools, training, and direct experience with the specific forces involved. Homeowners who have attempted this repair based on online videos account for a significant portion of serious garage door-related injuries each year.

Several factors significantly accelerate spring wear beyond the manufacturer's rated cycle count. High-frequency use is the most common — a household that opens the garage door four or more times daily accumulates cycles at double the rate of average use, potentially reducing a 10-year spring to 4 or 5 years. Lack of lubrication allows the coil sections to rub against each other, generating heat and metal wear that weakens the steel over time. Moisture and corrosion create stress fractures in the coil surface — a spring with visible surface rust on the coils is already compromised and can break well before its rated cycle limit is reached. Improper spring sizing is a technical problem that shortens lifespan dramatically: a spring calibrated for less than the actual door weight is under constant overload from the day it is installed. Montreal's extreme temperature cycling between -30°C winters and +35°C summers causes the steel to expand and contract seasonally, adding a form of thermal fatigue on top of the mechanical fatigue from normal use. A spring exposed to multiple adverse factors simultaneously — high use, no lubrication, moisture, and extreme cold — may last only 3 to 4 years regardless of its nominal rating.

Call immediately if you hear the loud bang of a spring breaking, if the door opens only a few inches before the opener stops or reverses, if one side of the door is visibly lower than the other, or if the opener sounds like it is straining noticeably harder than usual. A broken or weakened spring does not recover on its own — there is no self-repair mechanism in a failed steel coil. Every day of delay increases the risk of secondary cable failure, opener motor damage, and additional hardware wear. The sooner the spring is replaced, the less likely a single repair turns into a more extensive and expensive service call.

Continuing to operate the door after a spring breaks adds repeated abnormal stress to the opener and other hardware with every cycle, since the counterbalance system stays out of normal working order. The risk of additional damage and unsafe movement increases the longer this continues. Stop operating the door and arrange an inspection before using it again.

Spring selection is based on four primary measurements: the door's total weight, the door's height, the spring's wire diameter, and the inside diameter of the coil. These four values together determine the spring's torque output and the number of quarter turns required to wind it to the correct tension for that specific door. An incorrectly sized spring — even one that physically fits on the shaft and appears similar to the original — produces a door that is out of balance. A spring with too little torque results in a door that feels heavy and strains the opener. A spring with too much torque results in a door that flies open and is difficult to close. Both conditions accelerate wear on every connected component: cables, rollers, tracks, and opener. This is why using the manufacturer's spring specifications, or physically measuring the door weight and hardware, is essential — not simply matching the visible size of the old spring.

Yes. Every six months, lubricate the spring coils with a lithium-based garage door lubricant — apply it across the full length of the coil and cycle the door a few times to work it into the coil gaps. Do not use WD-40; it evaporates quickly and leaves no lasting protective film. Annually, have a technician inspect and test the spring balance — this isn't something to check yourself, since an unbalanced or damaged spring under tension can be dangerous to handle. Addressing early rust with a rust-inhibiting lubricant before it penetrates deeply into the coil significantly extends spring lifespan. Proactive maintenance every six months prevents the large majority of emergency spring failures.