Garage Door Springs do essentially all of the lifting. The opener guides a door the springs have already balanced — it does not carry the weight. When a spring lets go, a door of 150 to 250 pounds becomes immovable in an instant, and it always seems to happen on the coldest morning of the year.
1. The door feels heavy by hand
This is the most reliable check on the list and it takes half a minute. Pull the release cord, raise the door by hand to about waist height, and let go. A door whose springs are doing their job will sit there. One that sinks toward the floor has springs that have lost tension and are no longer carrying what they were wound to carry.
If the door will not hold itself at waist height, the springs are already failing. Everything else on this list is confirmation.
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2. A gap in the coil
Look along the spring on the bar above the opening. A sound one is a continuous tight helix with no interruption anywhere along it. An inch or two of daylight partway along means it has already gone: springs fail under tension and the two ends spring apart at the break. On a two-spring door the remaining spring will still shift the door after a fashion, which is exactly why people carry on for weeks without noticing anything is wrong.
3. Jerky travel, or one side lifting first
A door that climbs in stages, judders on the way up, or lifts noticeably higher at one end has stopped sharing the load evenly. On a pair of springs that normally means one has weakened first and the other is now covering for it — doing work it was never sized for, at an accelerated rate. The second one does not usually take long to follow.
4. Cables gone slack or jumping the drum
Cables and springs work as one system, so when tension drops the cables go loose. A slack cable can unwind off its drum altogether, and once it does the door is being held at one corner only. If you can see loose cable while the door is shut, that is the point to stop using it entirely.
5. It has simply been long enough
Springs are measured in cycles rather than years, one cycle being a single open plus a single close. What you were sold determines how long you get, and it is rarely mentioned at the point of sale.
| Spring rating | Roughly equals | 2 cycles a day | 4 cycles a day |
|---|---|---|---|
| 10,000 cycles | Builder-grade standard | ~13 years | ~7 years |
| 20,000 cycles | Upgraded spring | ~27 years | ~13 years |
| 30,000 cycles | High-cycle spring | ~40 years | ~20 years |
What to do if you spot any of these
- Stop using the opener — forcing an unbalanced door damages the motor and the panels.
- Do not attempt to unwind or replace a Garage Door Springs yourself. The stored energy is genuinely dangerous.
- Always replace springs in pairs. A new spring next to a fatigued one fails again quickly.
- Ask for the cycle rating you are buying, not just a price.
Why we replace both
We get asked to change just the broken one fairly often, and we decline. It is not an upsell. Both springs were wound on the same day and have done an identical number of cycles, so the survivor is just as far through its life as the one that went. Fitting a new spring beside a worn one gives you a door that never balances properly and a second call-out inside a few months. The pair costs slightly more once and then stops being a problem.
Why the springs matter more than anything else
The springs carry the weight of the door every time it moves. The Garage Door Opener does not lift anything — it guides a door the springs have already balanced. That single distinction explains most of what goes wrong on a garage door.
As springs weaken, the motor takes up the slack. It works harder every cycle, the drive gear wears faster, and the door starts feeling heavy by hand. People read that as an opener problem and replace the Garage Door Opener, which fixes nothing because the new one inherits exactly the same load.
How to tell how much life yours have left
Springs are rated in cycles, not years, and one cycle is one open plus one close. A builder-grade spring is often rated around ten thousand, which sounds enormous until you count actual use.
Two cars, a school run, somebody working from home and a trip to the bins is six to eight cycles a day without trying. That is roughly four years, not the fifteen people assume. If you know when the door was fitted and roughly how much it gets used, you can estimate where you are — and if the door has started feeling heavy by hand, you are near the end of it.
What we check on a spring call
The same list every time, because a new spring on worn hardware just moves the problem along:
- Coil condition along the full length of both springs — gaps, surface rust and fatigue.
- The cycle rating originally fitted, so we can tell you honestly what the other one has left.
- Cables at the drums, where fraying starts out of sight.
- Drum seating and bearing wear, both of which change how evenly the door lifts.
- Balance after fitting, then both safety reverses before the door goes back into use.
Storms, and the largest opening in the house
Nor'easters bring sustained wind off the water and heavy wet snow, and the garage door is the biggest single opening in most houses. Structural engineers are blunt about the consequence: once the door goes, wind is inside the building and pressure starts working against the roof from underneath. It is the one part of the house where a maintenance problem can turn structural.
Getting the lubricant right
Use a light lithium or silicone garage door spray. Not heavy grease, which stiffens in the cold and makes a winter door drag, and definitely not general penetrating oil.
Penetrating oil is a solvent. It strips out whatever lubricant was there, evaporates, and leaves the part drier than when you started — then attracts grit, which turns into a grinding paste on the rollers. Similar money, opposite result.
The DIY job that goes wrong most
Anything involving springs or cables. They hold the entire weight of the door under tension, and they are the two parts most likely to fail. Lubrication, cleaning the sensors and tightening bolts are all perfectly reasonable to do yourself. The parts carrying the load are not.
The short version
Most of what we get called out to gave warning first, and most of it was cheap to deal with at the point the warning appeared. The expensive jobs are almost always the ones that were left.
If the door is telling you something, it is worth acting on before winter rather than during it.
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