Most of the emergency calls we take were avoidable. Not all — metal fatigue does what it does — but a large share of them announced themselves for weeks before anything actually broke. Here is what to look at, in the order that makes sense, and what to leave alone.
Do it twice a year: once in autumn before the cold sets in, which is the important one in this climate, and once in spring after the salt season ends.
Start with the balance test
Everything else follows from this one, so do it first.
Close the door. Pull the red release cord to disconnect the opener. Lift the door by hand to about waist height and let go.
- It stays put — balance is correct.
- It drops — the springs have lost tension.
- It rises — the springs are over-tensioned.
A door that fails this test is being carried by the opener on every cycle, which is not what an opener is for. It will express that as erratic behaviour for a while and then fail. Spring tension is not a homeowner adjustment — this is the finding you call about.
While the opener is disconnected, also notice how the door feels. It should move smoothly with modest effort. Grinding, catching or a sudden change in resistance partway through travel is a tracking or roller problem.
Look at the springs
Above the door, on the shaft, or along the horizontal tracks.
Look for a visible gap in the coil — that is a broken spring, and the door should not be used with the opener. Look for rust, which shortens life significantly. Look for coils that appear stretched or unevenly spaced, and on extension springs for any sign that the safety cable running through the spring is missing or damaged. That cable is what stops a failed extension spring becoming a projectile, and it should be there.
Look at the cables
The steel cables run from the bottom brackets up to the drums on the spring shaft. Check them along their whole length, and pay particular attention at the bottom bracket, because that is where road salt gets to them and that is where they fail.
Fraying, kinking, rust, or a cable that has come partly unwound from its drum all mean the same thing: call before it snaps. A cable failure drops one side of the door instantly.
Do not touch the bottom brackets. They are under the full tension of the spring system.
Check the rollers
With the door closed, look at each roller. Flat spots, chips, missing bearings, or a roller that wobbles in its stem all indicate wear.
Worn rollers are the single most common reason an older door is loud, and they make the opener work harder. Sealed nylon rollers with ten or more ball bearings are a modest upgrade that transforms how a door sounds — and if there is a bedroom above the garage, they are the cheapest half of solving that problem.
Check hinges, track and hardware
Hinges between sections: look for cracks, and for tearing at the screw holes where the metal has elongated. A torn hinge lets the section shift and eventually pulls the door out of alignment.
Track: should be plumb on the verticals and parallel on both sides. Look for dents, bends, and brackets that have worked loose from the wall or ceiling.
Fasteners: a door that cycles thousands of times vibrates its own hardware loose. Snug up the visible bolts on hinges, brackets and track — snug, not overtightened, which strips the thin metal.
Lubricate, correctly
This is the one piece of real maintenance you can do yourself, and the one most commonly done wrong.
Use a garage-door-specific lithium or silicone spray. Apply to the springs, the hinges, the roller stems and bearings, the shaft bearings, and the opener rail.
Do not use WD-40. It is a solvent and a water displacer, not a lubricant. It strips out the grease that should be there and leaves the part drier than it found it.
Do not lubricate the tracks. They are a guide surface, not a bearing surface. Grease on the track collects grit and makes everything worse. Wipe them clean with a dry cloth instead.
The two safety tests
These take a minute between them and almost nobody does them.
Photo-eye test. Start the door closing, then break the beam with a broom handle or your foot near the sensors. The door must reverse immediately.
Mechanical reversal test. Lay a solid object flat on the floor in the door's path — a length of timber works well. Close the door. On contact, it must reverse, not push through.
If either test fails, stop using the door normally until it is corrected. These two systems are what stand between the door and whatever is underneath it.
Weather seal and drainage
Check the bottom seal for cracks, hardening and gaps where light shows through. Check the seal along the jambs and across the top. Rubber hardens in this climate and a seal that was fine two winters ago may not be sealing at all now.
Then look at where water goes. If meltwater pools in the opening, it will freeze the door to the slab in January and it will accelerate corrosion on the cables and the bottom section. This is worth solving before winter, not during.
What to leave alone
Three things are not homeowner jobs, and the reason in every case is stored energy:
- Anything involving spring tension — adjusting, winding, or replacing.
- The bottom brackets, which are under full cable tension.
- Cable replacement, for the same reason.
Everything above the bottom bracket — cleaning, inspecting, lubricating, snugging a hinge bolt, aligning a photo eye — is fine to do yourself.
When to book a professional tune-up
If the door fails the balance test, if you find fraying cable, if it has become noticeably louder over the year, or if it has simply never been serviced and the house is from the 1970s or 1980s, it is worth a visit. In this area that describes a very large share of houses — the 1970s was the biggest construction decade across most of DuPage County, and a door on original equipment from then is several service lives past due.
An autumn tune-up costs a fraction of a January emergency call, and we are much easier to book in October. Get in touch — we cover Westmont, Downers Grove, Hinsdale, Darien and eleven other towns.