Garage Door Won't Stay Open? Why It Drifts Down & What Spring Balance Has to Do With It

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Introduction

You pull into the driveway, hit the remote, and the door opens fine. But when you disconnect the opener during a power outage, or when you lift the door by hand, it will not stay put. Let go, and it creeps back down toward the floor. Or the opposite happens: it wants to fly up out of your hands. Either way, something feels off, and the instinct that something is wrong is correct.

A garage door that will not stay open on its own is almost never a broken opener and almost always a balance problem. The door is not being held up by the opener. It is being held up by the springs, and when the springs lose the exact amount of stored energy needed to counter the weight of the door, the door starts to drift. This guide explains what balance actually means on a residential garage door, the one-minute test you can run yourself to confirm it, the handful of causes behind a drifting door, why it quietly destroys your opener if you ignore it, and the realistic 2026 costs to put it right in the London area. Every external link here points to a live page on a recognized industry body. This is a topic where a quick diagnosis today saves a much larger repair down the road.

Your Opener Does Not Hold the Door Up. The Springs Do.

This is the single most important idea in this article, and it is the one most homeowners get backwards. When your door glides open and hangs in place at the top, it feels like the motor is doing the work. It is not. The opener is a guide and a trigger. It nudges the door into motion and holds the very last bit of position, but the actual lifting force, hundreds of pounds on a typical double door, comes from the counterbalance spring system mounted above the opening.

On a well-balanced door, the springs store almost exactly enough energy to offset the weight of the door at every point in its travel. That is why you can lift a properly balanced 250-pound door with two fingers. The springs are carrying the load; your hand is just steering. When you let go halfway, a balanced door stays exactly where you left it, floating in place, because the upward pull of the springs and the downward pull of gravity cancel out.

The moment those two forces stop matching, the door drifts. If the springs are a little weak, gravity wins and the door sinks. If the springs are over-tensioned or the door is unusually light, the springs win and the door rises. A door that will not stay open is telling you, in the clearest possible language, that its balance has slipped. To understand the two spring types doing this work, our torsion vs extension springs guide breaks down how each system stores and releases energy.

The One-Minute Balance Test You Can Do Yourself

You do not need any tools to confirm a balance problem, and you do not touch the springs. You only interact with the parts you already touch every day. Here is the safe procedure.

1. Close the door fully. Start from a fully closed door so there is no chance of it dropping onto anything.
2. Disconnect the opener. Pull the manual release rope (the red cord hanging from the opener trolley) to disconnect the door from the motor. Our manual release guide shows exactly how this works and how to re-engage it afterward.
3. Lift the door by hand to about waist height, then let go. A balanced door will stay roughly where you put it, give or take a few inches. Now lift it to about halfway (chest height) and let go again.
4. Watch what happens. If the door holds its position at both heights, your balance is good and the problem is elsewhere. If it sinks toward the floor, your springs are under-tensioned or fatigued. If it rises on its own, the springs are over-tensioned. If it feels very heavy to lift at all, a spring may be broken or nearly so.
5. Re-engage the opener. Reconnect the trolley (usually by pulling the release rope back the other way or running the opener once) and you are done.

This is the same balance test we recommend as a monthly habit for every door, not just a troubled one. Our garage door balance test guide walks through it in more detail, and our monthly safety test folds it into a broader one-minute routine worth doing on the first of every month. A door that passes the balance test but still misbehaves under power is pointing you toward the opener instead, covered in our opener troubleshooting guide.

Why a Door Drifts Down: The Common Causes

A door that sinks after you release it has lost the balance between spring force and door weight. Several things can cause that, and they are worth understanding even though the fix for most of them is a professional adjustment or replacement.

1. Springs that have fatigued with age

Torsion and extension springs are rated in cycles, one cycle being a single open and close. A standard spring is rated for about 10,000 cycles, which on an average household comes out to roughly seven to twelve years. As a spring approaches the end of its life, it does not always snap dramatically. Sometimes it simply weakens, losing a little of its stored tension so that it no longer fully offsets the door. The door still opens, but it has become subtly heavy, and it drifts down when released. Our spring cycle life guide explains why a higher-cycle spring is often worth the modest upcharge precisely to delay this.

2. A spring that has partially failed or is close to breaking

If one of two springs has broken outright, the remaining spring is trying to lift a door that now weighs roughly twice what it was designed to counter. The door becomes very heavy, the opener strains, and manual lifting is a struggle. A partially failed spring produces a milder version of the same symptom. If your door went from fine to noticeably heavy over a short period, suspect a spring.

3. Tension that was never set correctly

Balance is set by the number of turns a technician winds into the springs during installation or replacement, calibrated to the exact height and weight of your specific door. If a spring was wound a half-turn short, or the wrong spring was fitted, the door will be out of balance from day one. This is why a door that has drifted since a recent repair should go back to whoever did that work.

4. A door that has gotten heavier than its springs

Springs are matched to the weight of the door they were installed with. If the door has since gained weight, the springs may no longer be strong enough. Common culprits: a DIY insulation kit added to a previously uninsulated door, water-logged wood panels, or thick new coats of paint. Adding weight without re-rating the springs is a frequent cause of a suddenly drifting door, which is why our maintenance guidance and any reputable installer will flag insulation retrofits as a balance consideration.

5. Binding in the tracks or rollers (a false balance problem)

Occasionally a door that seems out of balance is actually being held or dragged by friction. Bent tracks, dry or seized rollers, or a bottom fixture catching can make a door feel heavy or hold it in a spot it should not hold. This is worth ruling out because it can masquerade as a spring issue. A door that binds unevenly, squeals, or shudders as it moves is pointing at the tracks and rollers rather than the springs.

Why a Door That Won't Stay Open Wears Out Your Opener

It is tempting to shrug off a drifting door. It still opens, after all. But an out-of-balance door quietly punishes the most expensive part of the system: the opener. Because the springs are no longer carrying the full weight, the opener motor has to make up the difference on every single cycle. It draws more current, runs hotter, and strains its drive train against a load it was never designed to lift.

Over months, that extra load burns out the motor faster, wears the trolley and chain or belt, and strips the plastic main drive gear that translates motor rotation into door movement. That last failure is one of the most common opener breakdowns we see, and a chronically heavy door is a leading cause. If you would like to understand exactly what that looks like, our recent guide on why an opener runs but the door won't move covers the stripped main drive gear in detail. The frustrating part is that the gear failure gets blamed on the opener when the real culprit was a balance problem that could have been fixed for a fraction of the cost.

There is a safety dimension too. A door held up mostly by an opener rather than its springs is more likely to come down hard if the opener fails or if someone pulls the manual release without realizing the door is unbalanced. The Door & Access Systems Manufacturers Association, the industry trade body, is direct about this in its garage door safety tips: the counterbalance spring system stores enormous energy and should be adjusted or replaced only by a trained technician. A balanced door is a safer door, not just a quieter one.

Why Spring Adjustment Is a Professional Job

Everything up to the balance test is safe homeowner territory. Adjusting or replacing the springs is not. The reason is the stored energy involved. A torsion spring on a closed residential door holds a couple of hundred pounds of wound tension. Releasing or adjusting it means turning winding bars in a precise sequence against that force, and a slipped bar at full wind has enough energy to break bones or worse. This is not a caution born of liability language; it is the single most common serious injury in the whole trade.

A professional balance correction follows a controlled sequence: the door is secured, the springs are unwound in increments with properly sized winding bars, the correct spring is confirmed against the door weight, the tension is wound back to the exact quarter-turn count for the door height, and the door is cycled and re-balanced by hand to verify it floats at every point. Getting the count wrong by even a half-turn leaves the door heavy, light, or off-balance, so the verification step matters as much as the adjustment.

DASMA's homeowner maintenance guide reinforces the same split: homeowners handle cleaning, lubrication, visual inspection, and the balance test, while spring, cable, and bottom-bracket work stays with a trained technician. If you take one rule from this article, let it be that the balance test is yours to run and the spring adjustment is ours to do.

What a Professional Will Check and Correct

When we come out for a door that will not stay open, the visit is a short diagnostic followed by a targeted fix. A typical call runs like this:

• Weigh and measure the door. The technician confirms the actual door weight and dimensions, because the correct spring is a function of both.
• Inspect the springs. Rust, coil gaps, and cycle age all get checked. A spring near the end of its rated life is usually replaced rather than re-tensioned, because re-tensioning a fatigued spring buys only a short reprieve.
• Check cables, drums, and bearings. These parts share the counterbalance load, and a balance problem often travels with a worn cable or drum. Addressing them together while the system is unloaded is efficient and avoids a second visit.
• Set the tension and re-balance. The springs are wound to the correct count, and the door is tested by hand at multiple heights until it floats in place.
• Test under power. Finally the opener is reconnected and the door is cycled to confirm the motor is no longer straining and the travel and force settings are still correct.

A door that has been dragging on the opener for a while is worth pairing with a full tune-up service, because the same visit can lubricate, inspect, and re-balance the whole system so the corrected door stays corrected.

Realistic 2026 Costs in Southern Ontario

Prices on this page are before HST.

Balance-related repairs are among the more affordable mechanical fixes on a residential door, especially when caught before they take the opener with them. Realistic 2026 numbers for the London area:

• Spring re-tension and re-balance only (springs still healthy): typically $90 to $220 all-in as a service call.
• Single torsion spring replacement: typically $229 to $320 all-in, depending on spring rating and door size.
• Pair of torsion springs replaced together: typically $260 to $400 all-in on a single door and $300 to $550 on a double; replacing both at once is standard practice because the second spring is usually the same age as the first.
• High-cycle spring upgrade: a modest upcharge over standard springs, often $80 to $150 for a 25,000-cycle spring, which is roughly two and a half times the rated life of a standard one.
• Balance correction bundled into a full tune-up: typically $120 to $220 all-in.

Two notes on these numbers. First, every reputable installer carries a minimum service-call fee that covers the truck, the technician's time, and the after-job balance verification, so a small adjustment is rarely priced as if the part alone were the whole cost. Second, and this is the key economic point, a $150 balance correction is dramatically cheaper than the $525 to $1,200 opener replacement that a chronically unbalanced door eventually forces. Fixing balance early is one of the highest-return maintenance calls on the whole door.

How to Prevent Balance Problems in the First Place

You cannot stop springs from aging, but you can catch a balance problem early and avoid the things that accelerate it. Three habits do most of the work.

1. Run the balance test monthly. Sixty seconds on the first of the month catches a drifting door long before it damages the opener. A door that used to hold at waist height and now sinks is your early warning.
2. Do not add weight to the door without re-rating the springs. If you insulate an uninsulated door, add heavy hardware, or the wood panels have swelled with moisture, have the springs checked. Adding load to an old spring is a shortcut to a drifting door.
3. Keep the moving parts lubricated and the door serviced. Twice-yearly lubrication and an annual professional tune-up keep friction low and let a technician catch a fatiguing spring before it fully lets go. Our lubrication guide covers what to use and where.

Beyond those, understanding how the whole system ages helps you plan. Our garage door lifespan guide walks through each component on its own clock so you know roughly when the springs, cables, and opener on your particular door are due for attention.

How This Fits Into the Bigger Picture

The counterbalance system, the springs, cables, drums, and bearings, works as a single team to make a heavy door feel weightless. Balance is the outcome when that team is in tune. When a door will not stay open, the balance has slipped, and the fix is to restore the exact match between spring force and door weight. It is a small, precise correction with an outsized payoff, because a balanced door is quieter, safer, easier to lift by hand in an outage, and far gentler on the opener that most homeowners assume was doing the lifting all along.

The DASMA terminology for these parts, if you like to know the proper names, is defined in the association's Technical Data Sheet TDS-160 on sectional door terminology, which is a useful reference the next time a technician talks about counterbalance, torsion shafts, or cable drums.

Common Mistakes Homeowners Make

Blaming the opener for a spring problem

The most common mistake, and an expensive one. A straining opener on a heavy door looks like a failing opener, so homeowners replace a perfectly good motor while the real problem, the balance, goes unfixed and promptly strains the new opener too. Always run the balance test before spending money on an opener.

Trying to adjust the springs themselves

Web videos make torsion spring adjustment look approachable. It is not. The stored energy is enormous and the failure mode is sudden and violent. Every year technicians treat homeowners who tried to save a service call. Please leave the winding bars to a professional.

Ignoring a door that has become heavy

A door that used to lift with two fingers and now takes real effort is a door on borrowed time. The heaviness means the springs are fading. Waiting until a spring snaps turns a planned $350 spring job into an emergency call plus, often, a damaged opener.

Adding insulation without checking the springs

Retrofitting insulation onto a light single-skin door can add meaningful weight. If you do it, budget to have the springs checked and, if needed, re-rated. Otherwise the newly heavier door will drift and drag on the opener.

Frequently Asked Questions

Is it safe to keep using a garage door that won't stay open?

For a short window, yes, but not indefinitely. The door still functions, but the opener is carrying weight it was not designed for, which shortens its life, and an unbalanced door is more likely to come down hard if the opener is disengaged. Treat a drifting door as a repair to book soon, not an emergency, unless the door has become very heavy or you suspect a broken spring, in which case call promptly.

Why does my door stay open when powered but drift down when I disconnect the opener?

Because the opener is masking the balance problem. Under power, the motor holds the door in position and hides the fact that the springs are no longer carrying the full load. Disconnect the opener and the true balance shows itself. This is exactly why the balance test starts with pulling the manual release: it removes the opener from the equation so you can see what the springs are actually doing.

Can I just tighten the springs a little to fix it?

No, not as a homeowner. Spring tension is adjusted by winding the springs against a couple of hundred pounds of stored energy with proper winding bars, in a precise turn count matched to your door. It is genuinely dangerous work and one of the leading causes of serious injury in the trade. This is the part of the job to leave to a trained technician.

How do I know if it's a spring problem or a track problem?

Run the balance test with the opener disconnected. If the door drifts smoothly up or down, it is a balance and spring issue. If instead it binds, catches, shudders, or squeals as it moves, and feels stiff in spots rather than uniformly heavy, the tracks or rollers are more likely the cause. A technician can tell the two apart in minutes.

My door drifts up instead of down. Is that still a balance problem?

Yes. A door that rises on its own is over-tensioned: the springs are pushing harder than the weight of the door requires. It is less common than drifting down but the same category of problem, and the same fix, a professional tension adjustment, applies. An over-tensioned door can also interfere with the opener's force settings, so it is worth correcting.

Will a new opener fix a door that won't stay open?

No, and this is the costly trap. A new opener will lift the unbalanced door for a while, but it will strain against the same excess weight the old one did and wear out early too. Fix the balance first. Often, once the door is properly balanced, the original opener runs fine and no replacement is needed at all.

How long should the springs last after they're replaced?

A standard spring rated for 10,000 cycles lasts roughly seven to twelve years for an average household that cycles the door a few times a day. A high-cycle spring rated for 25,000 or more can last well over twice as long. If you open your door many times a day, the higher-cycle upgrade usually pays for itself, as our spring cycle life guide explains.

Conclusion

A garage door that will not stay open is one of the clearest signals a door can send: the springs have lost the balance that made a heavy door feel weightless. The good news is that the diagnosis is a one-minute test you can run yourself, and the fix is a targeted, affordable adjustment when caught early. The bad news is only for the homeowners who ignore it, because a drifting door quietly grinds down the opener until a cheap balance correction becomes an expensive opener replacement.

If your door has started to creep down when you release it, or it has become noticeably heavy to lift by hand, run the balance test today, and if it fails, book a service call before the opener pays the price. A London-based technician can weigh your door, inspect the springs, and re-balance the whole system in a single visit. Call 519-619-7901, reach us through our contact page, or browse new doors and openers on our price estimator. AA Advantage Doors has kept London-area doors balanced, quiet, and safe since 2009; our BBB profile has the service history.