A broken torsion spring on the shaft above a residential garage door

Spring changes

The bang you heard
was the spring.

A torsion spring carries the entire weight of your door. When it goes, the door will not lift and the opener cannot save it.

Do not use the door, and do not try to wind it yourself.

A torsion spring stores enough energy to break bones, and a winding bar that slips takes the whole load. If the door is stuck part-way, keep people and cars clear of the opening and call us. This is the one repair we ask people never to attempt.

A J.Mac Doors technician fitting a new torsion spring from a step ladder
Why it matters

A spring holds the whole weight of the door.

On a typical two-car door that is well over a hundred kilos, held under tension by a steel coil. When it lets go, that energy has to go somewhere - which is why the opener suddenly cannot lift a door it moved perfectly well yesterday.

  • Torsion and extension springs replaced
  • Fitted in matched pairs
  • Door rebalanced and tested by hand
  • Safety reverse checked before we leave
The signs

How to tell it is the spring.

How we do it

Why we change both.

  1. 1Springs wear together

    A pair installed on the same day has taken the same number of cycles. When one fails the other is close behind.

  2. 2A mismatched pair pulls unevenly

    That twists the door in the opening and wears the rollers, tracks and opener.

  3. 3Balance is checked, not assumed

    After fitting we set the tension and test the door by hand at several heights.

  4. 4Safety features tested

    Auto-reverse and the photo eyes are checked before we leave.

A technician fitting a torsion spring above a garage door
“A spring is the one part of your door that can hurt you. Please let us do it.”
Jim McCormack · Founder

Spring gone this morning?

We carry torsion springs in the common sizes, so most changes finish on the first visit.

Call now604-230-3756
A torsion spring and winding bars above a garage door
How long a spring lasts

Cycles, not years.

Most residential torsion springs last between 10,000 and 15,000 cycles. One cycle is once up (open) and once down (closed) - so a household that comes and goes four times a day gets through them faster than the number suggests. It is why two doors on the same street, fitted the same week, do not fail the same year.

  • 10,000 to 15,000 cycles is the normal life
  • One cycle is one open and one close
  • Replaced in matched pairs so the second does not follow
  • Door rebalanced and safety-tested afterwards
Extension springs

Before you call us.

How to check the ones along the sides.

Not every door has torsion springs above the opening. If yours does not, have a look at the sides of the door instead - you may have extension springs, and they tell you plenty just by looking.

  1. Stretched when the door is closedThat is the resting state. Slack springs on a closed door mean the tension has gone.
  2. Kinks in the coilsA kinked coil is a spring that has already started to fail.
  3. Uneven spacingCoils that have drifted apart along the length are stretched past their life.
  4. A visibly broken springStop using the door and call us. Do not attempt to replace it yourself.
Common questions

Straight answers.

On a two-spring door, yes, and we will explain why on site. They have the same age and cycle count, so replacing one leaves you paying a second call-out shortly after.

We strongly advise against it. Torsion springs are wound under extreme tension and the tools and technique matter. This is the repair most likely to injure someone.

Most are done within the visit, including rebalancing and testing.

Standard springs are rated between 10,000 and 15,000 cycles - roughly seven to ten years for an average household. High-cycle springs are available if you use the door heavily.

Some lighter doors use a single spring. We will match what your door needs rather than upsell you.

Also in repairs

More we fix.

From the workshop

Worth knowing before you call.

Thirty-plus years of doors, written down. Straight answers on springs, openers and what a door actually costs.

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