If you heard a loud bang from the garage and now the door will not lift, you almost certainly have a broken spring. It is the most common garage door repair we do across Sydney, and it is also the one repair you should never attempt yourself.
What garage door springs do
Springs counterbalance the door's weight, which can be well over 100 kg. With healthy springs, the opener (or your arm) only lifts a fraction of that. Most Sydney doors use torsion springs, mounted on a shaft above the door. Older doors may use extension springs that stretch along the horizontal tracks.
Why springs break
- Cycle life. Standard springs are rated for roughly 10,000 open-close cycles. At four cycles a day, that is about seven years of use.
- Rust and corrosion. Salt air in coastal suburbs and unlubricated coils shorten spring life noticeably.
- Wrong spring for the door. An undersized spring installed cheaply works harder every cycle and fails early.
Warning signs before a spring fails
- The door feels heavier than it used to, or the opener strains and jerks.
- The door rises a few centimetres then stops, or slams shut faster than normal.
- The door sits crooked in the opening, or you can see a visible gap in the spring coil.
- Loud creaking or popping during operation.
If any of these sound familiar, get the springs inspected before the failure happens at the worst possible moment. A stuck door is a big part of why doors refuse to open.
Why spring replacement is not a DIY job
A wound torsion spring stores enormous energy. Releasing or winding it requires proper winding bars, the correct technique and experience with the door coming under and off tension. Done wrong, the bar or the spring itself can strike with bone-breaking force. There is a reason every manufacturer's manual says the same thing: springs are for trained technicians only. It is not a upsell; it is physics.
What a professional replacement involves
A technician weighs up the door, selects springs matched to its exact weight and drum size, replaces both springs on a two-spring door (the second one has the same mileage and will fail soon after the first), rebalances the door and tests the opener force settings. The whole job typically takes about an hour. In Sydney, expect roughly $250 to $550 depending on spring type and door size; we confirm the exact price before starting. High-cycle springs rated for 25,000+ cycles are available for busy doors and cost a little more upfront but last far longer.
Frequently asked questions
Can I still use the door with one broken spring?
No. Running the opener with a broken spring strains the motor and can snap cables or bend panels, turning a spring job into a much bigger bill.
How long does spring replacement take?
Usually around an hour on site. We carry common spring sizes in the van, so most Sydney jobs are done in a single same-day visit.
Should both springs be replaced at once?
Yes, on a two-spring door. Both springs have done the same number of cycles, and replacing only one usually means a second call-out within months.
