# Won't open or close 163 questions about won't open or close, each carrying its safety verdict and its sources. Of these 163 questions, 69 carry a "safe to DIY" verdict, 68 call for caution, and 2 are professional-only work. That ratio is the point: most of what people search about garage doors can be handled at home, and a small, specific part of it cannot. ## How the verdict is assigned Every page that touches a physical procedure carries one of three verdicts. What decides which is a single question: is there stored energy under the reader's hands? Springs, cables, drums and the bottom bracket hold the energy needed to lift the whole door, so they are always professional work. Sensors, remotes, seals and hinges do not, which is why almost everything else can be handled at home. That criterion is not ours: 16 CFR 1211.16(b) specifies the exact words the manufacturer must print in your opener's manual, and one of them directs repairs to cables and spring assemblies to a qualified service person. The full criteria are published in the [editorial policy](https://garagedude.shop/editorial-policy/). ## Questions in this topic [How to open garage door manually?Safe to DIY](https://garagedude.shop/questions/wont-open-or-close/how-to-open-garage-door-manually/)[How to open garage door manually from outside?Safe to DIY](https://garagedude.shop/questions/wont-open-or-close/how-to-open-garage-door-manually-from-outside/)[How to open electric garage door manually?Safe to DIY](https://garagedude.shop/questions/wont-open-or-close/how-to-open-electric-garage-door-manually/)[How to open automatic garage door manually?Safe to DIY](https://garagedude.shop/questions/wont-open-or-close/how-to-open-automatic-garage-door-manually/)[How to open garage door manually from inside?Safe to DIY](https://garagedude.shop/questions/wont-open-or-close/how-to-open-garage-door-manually-from-inside/)[How to reset garage door after pulling emergency release?Safe to 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A garage door is not lifted by the opener. It is lifted by the spring, and the opener only guides it. That distinction explains almost everything else on this page. A residential door weighs between 85 and 400 pounds depending on size and material. The counterbalance system — springs, cables, drums and bottom brackets — stores the energy needed to raise that weight and gives it back on the way up. With the counterbalance set correctly the door stays put when released halfway, and the opener only has to overcome friction. This is why an unbalanced door destroys openers: the motor ends up lifting a load it was never sized for. And it is why springs and cables are professional work while sensors and remotes are not — one group holds that stored energy and the other does not. The test is available to anyone. Disconnect the opener with the red release, lift the door halfway by hand, and let go. If it stays where you left it, the counterbalance is right. If it drifts down or shoots up, it is not, and CPSC says a door in that state should be serviced by a professional. ## What order should I check things in? Cheapest and safest first, because that order also happens to be the most likely. Start with the remote battery, then the wall button, then whether the opener has power at the outlet — a tripped GFCI accounts for more "dead openers" than any component failure. Next check the photo eyes, because a blocked beam does not merely interrupt one cycle. Federal rules require secondary entrapment protection to prevent the opener closing an open door at all while the beam is broken, so a filmed-over lens presents as a completely dead door in the closing direction. Only then test the door itself. Pull the red release with the door closed and lift by hand. If it moves freely, you have an opener or control problem. If it is very heavy, you have a counterbalance problem, and that is where the DIY path ends. The federally required text in your own manual draws the same line: it directs cable and spring repairs to a qualified service person, and it says never to go under a stopped, partially open door. ## Why exactly is this professional-only work? Because the stored energy does not go away when the door stops moving, and you can work out how much there is rather than take our word for it. The work needed to raise a door is its weight times its travel. A common insulated steel double door weighs around 200 pounds and travels 7 feet, so the spring stores roughly 1,400 foot-pounds . A 400 pound wood door doubles it. The important part is not the figure but when it is present. It does not appear while the door moves and vanish when it stops: a closed door means a fully loaded spring. That load is released through whatever is in contact with the spring the instant control is lost, and during a spring change that means the winding bars and the hands holding them. Cables and the bottom bracket sit in the same category for the same reason — they carry that load whenever the door is closed. It is why the bottom bracket is often marked at the factory as the one fitting a homeowner must not unbolt. See [why springs are professional-only work](https://garagedude.shop/safety/springs/) for the full breakdown. ## What does a technician do, and how do I know the price is fair? Knowing the job is what lets you judge the quote, so it is worth understanding even though you will not be doing it. On a torsion system the technician secures the door, releases the remaining tension in controlled increments using correctly sized winding bars, unloads the cables from the drums, replaces the spring on the shaft, rewinds it to a calculated number of turns derived from the door weight and drum diameter, re-tensions the cables, and tests the balance by hand. The winding count is calculated, not judged by feel. A comparable quote names five things: the exact part, its cycle rating , whether it is one spring or two, whether cables and bearings are being replaced at the same time, and the warranty separately on parts and on labour. A quote that omits the cycle rating cannot be compared to another, because a 10,000-cycle spring and a 100,000-cycle spring look identical on paper. We do not publish a national price, because the published sources disagree with each other and none documents its method. Get two written quotes and compare them line by line. [How to spot an unnecessary repair quote](https://garagedude.shop/hiring/red-flags/) covers the red flags. ## What does federal law actually require here? More than most people assume, and in writing. Every residential opener manufactured on or after January 1, 1993 for US sale must meet 16 CFR 1211, which incorporates the entrapment protection provisions of UL 325. Three concrete requirements matter to a homeowner. A downward-moving door must begin reversing within 2 seconds of hitting an obstruction and return to the fully open position. There must be a second, independent protection system — a photo eye, an edge sensor, or an equivalent device — which must also prevent the opener closing an open door. And the manual release handle must be red , reachable at 6 feet, and release under no more than 50 pounds of pull. The part almost nobody cites is §1211.16(b), which specifies the exact words the manufacturer must print in your manual. Among them: “Have a qualified service person make repairs to cables, spring assemblies and other hardware.” That is why this page's verdict on springs and cables is not our opinion. [What UL 325 and 16 CFR 1211 require](https://garagedude.shop/safety/ul-325/) covers the full standard. ## What is the one-minute test everyone should be doing? The reversal test, monthly. This is not our advice — it is the text federal law requires the manufacturer to print in your opener's manual. > “Test door opener monthly. The garage door MUST reverse on contact with a 1½ inch object (or a 2 by 4 board laid flat) on the floor.” Lay it flat on the floor in the door's path and close the door. It must reverse on contact. If it does not, stop using the opener until it is adjusted per the manual, repaired, or replaced. It matters because this system fails silently. A door whose reversal has stopped working looks and sounds exactly like one that still does, right up until something is underneath it. CPSC reports about 73 children aged 2 to 14 trapped and killed under automatic garage doors since March 1982 — roughly 3 a year — and that record is why the standard exists. CPSC also recommends inspecting the door and opener every 30 days. [Children, pets and the garage door](https://garagedude.shop/safety/child-safety/) covers the rest. ## How long does this actually last, and why is it measured in cycles? Springs are rated in cycles, not years , and one cycle is one opening plus one closing. That is the difference between a specification and a rule of thumb, and it explains why two identical doors last different lengths of time. A standard spring is typically rated at about 10,000 cycles. High-cycle springs, wound from thicker wire on a larger inside diameter, run 25,000 to 100,000. Translate that to your own house. At 4 cycles a day — leaving for work, back at lunch, one errand — that is 1,460 cycles a year, so 10,000 cycles is a little under 6.8 years . A household with teenagers and two cars burns through them well before the "seven to ten years" figure that gets repeated everywhere. The cycle rating is a manufacturer specification rather than a standard, so you have to ask for it. It is also the number that makes two quotes comparable: without it, a cheap spring and a good one look identical on paper. ## What should this cost, and why do we not publish a figure? We do not publish a national average because we could not find a source that holds up. The estimate sites disagree with each other, none documents its method, and repeating a figure we cannot trace would be exactly the problem this site exists to avoid. What we can give you is the shape of a comparable quote. It should separate four lines: the part and its specification, the labour, what is being replaced at the same time, and the warranty — separately — on the part and on the work. Get two written quotes before accepting either, and compare them line by line rather than on the total. Two matching totals can hide a spring with a third of the rated life of the other. Emergency and after-hours rates exist, but we found no sourceable figure for those either, so we do not invent one. [Our position on costs](https://garagedude.shop/costs/) explains the full reasoning. ## At what point should I stop and call someone? There are four signals, and any one of them on its own is enough to stop. - The door is very heavy by hand with the opener disconnected. The counterbalance has failed, and nothing but you is holding the door. - You can see a gap in the spring coil , or a cable that is frayed, slack, or off its drum. - The door sits crooked , higher on one side, or has come off its track. It is still under full tension and can move suddenly. - The door does not reverse on the board test. The entrapment protection is not working. None of those is calling too early. They are precisely the cases where the federally required manual text directs the work to a qualified service person, and where the cost of being wrong is not a broken part. The rule worth teaching at home comes from that same federal text, in capitals: “NEVER GO UNDER A STOPPED PARTIALLY OPEN DOOR.” ## Questions that come up next ### Does a door that reverses mean something is broken? No — the opposite. A door that stops and goes back up when it touches something is the entrapment protection doing exactly what 16 CFR 1211 requires. The fault worth investigating is a door that fails to reverse. ### Can I disable the photo eyes to get the door closed? No. That removes the external entrapment protection required since 1993, and it is the protection that exists because of the CPSC child fatality record. If a sensor is genuinely faulty, replace it — it is among the cheapest parts on the door. ### Is it safe to use the emergency release with the door open? The federally required manual text says to use it only when the door is closed wherever possible, because weak or broken springs may allow the door to fall rapidly. A great deal of DIY content advises the opposite. ### Should I replace one spring or both? If the door has two, quote both. The second is the same age and has taken the same number of cycles, so it is next. This is one of the few upsells in the trade that is genuinely honest. ## Sources - [16 CFR Part 1211 — Safety Standard for Automatic Residential Garage Door Operators](https://www.ecfr.gov/current/title-16/chapter-II/subchapter-B/part-1211) — US Consumer Product Safety Commission Tier 1 accessed 2026-08-17 - [16 CFR 1211.16 — required installation and user instructions (81 FR 20231)](https://www.govinfo.gov/content/pkg/FR-2016-04-07/html/2016-07552.htm) — US CPSC via Federal Register Tier 1 accessed 2026-08-17 - [Publication 523 — Non-Reversing Automatic Garage Door Openers Are a Hazard](https://www.cpsc.gov/s3fs-public/garage.pdf) — US Consumer Product Safety Commission Tier 1 accessed 2026-08-17 - [Technical Data Sheet 163 — U-factor and R-value for Residential and Commercial Garage Doors](https://www.dasma.com/wp-content/uploads/2022/09/TDS163..pdf) — DASMA Tier 2 accessed 2026-08-17