Is it safe to open a garage door with a broken spring?
No. Once a spring breaks, leave the garage door shut. The opener and the lift cables aren't built to hold the door's full weight on their own, and forcing it can add a cable or track repair to the bill. Coastside Garage Door replaces a broken torsion spring in Pacifica and along the coast starting from $200.
Call (650) 777-8776.
Once the spring snaps, the opener, the cables and anyone standing nearby take weight the door was never built to put on them. Leave the door down, keep the car where it is, and look without touching. The fix is a torsion spring replacement, and the Pacifica repair cost guide shows what moves the price.
Why shouldn't the opener lift the door?
A garage door opener is built to assist a balanced door, not to carry it. The torsion spring above the door, or the pair of extension springs along the tracks, stores the energy that does almost all the lifting. The opener's job is to nudge the door along a track that the spring has already taken most of the weight off.
Once the spring snaps, that stored energy is gone. Pressing the remote anyway puts the full weight of the door onto the opener's drive gear and onto the lift cables. Gears strip, chains jump, and belts stretch past where they seat properly. A stripped gear adds an opener repair, which starts from $75, to the spring bill.
What happens to the cables when the spring is gone?
The lift cables run from the bottom brackets up to the cable drums at either end of the torsion shaft. With the spring intact, the cables carry a manageable, evenly distributed share of the door's weight as it travels. Without it, the drums try to take on tension they were never sized for.
That is how a cable jumps a drum or frays partway through, usually on the side where the spring failed. A jumped cable lets one side of the door drop lower than the other, which binds the rollers in the track and can pull the whole panel out of square. A cable repair or door back on track starts from $160, and a bent track section raises it.
What can a homeowner safely check?
You can look. Stand clear of the door and glance up. Torsion springs sit on a shaft just above the door. Extension springs run along the upper tracks. A gap in the coil or a spring hanging loose at one end confirms the break without you touching anything.
You can also check whether the cables are still seated on their drums at the bottom corners of the door. If a cable is slack or off the drum, that confirms the load has already shifted somewhere it shouldn't be. None of this requires lifting the door, disconnecting the opener, or touching anything under tension. If what you see matches either of those signs, stop looking and call.
What should stay off limits until the spring is replaced?
Don't pull the opener's emergency release cord to move the door by hand. With the spring broken, the opener is all that holds an open door up, and releasing it can drop the full weight of the door on whoever is under it.
Don't try to prop the door open with a board or a ladder so you can get a car out. Keep the car exactly where it is, inside if the door won't open, outside if it already was. A door under uneven tension can shift again without warning, and nobody should be under it when that happens.
How is a torsion spring replaced safely?
A torsion spring is wound tight even on a standard home door, which is why winding bars and a clamped shaft matter more than strength. One spring fitted and the door balanced starts from $200. Both springs together start from $320, which makes sense on an older door.
On a two-spring door, the other spring has made the same number of cycles, and a regular-duty torsion spring carries an estimated life of 10,000 cycles, per the Prime-Line regular-duty torsion spring specification. Replacing both at once saves a second visit when the other one lets go.
Does the type of spring change what is safe to do?
Extension springs run horizontally above the upper tracks instead of on a shaft, and they rely on a safety cable threaded through the coil to stop a broken spring from becoming a projectile. If that safety cable is missing or was never installed, a snapped extension spring can whip loose with real force.
We fit one extension spring with its safety cable from $150 and recommend replacing both springs together if the door is original to the house, since one broken spring usually means its pair is close behind. The rule doesn't change: with a broken extension spring, the door stays down until it's fixed.
Coastside Garage Door replaces a single torsion spring from $200 and both springs together from $320 for homes along the San Mateo County coast, from Daly City and Pacifica to Half Moon Bay.
Common questions
Can I close a garage door manually with a broken spring?
No. Without the spring holding the weight, the door can drop fast and the cables can come off the drums. Leave it where it is and call for a torsion spring replacement from $200.
Call (650) 777-8776.
Will a broken spring damage my garage door opener?
It can. The opener motor and gears are built to nudge a balanced door, not to lift the full dead weight alone, so forcing it with the remote can strip the gears or burn out the motor over repeated tries.
How do I know if it is the spring and not the opener that failed?
Look above the door for the torsion spring. A visible gap in the coil, or a cable hanging loose at the bottom bracket, points to the spring. An opener fault usually leaves the spring intact but the door still won't move on its own.
Is a broken spring on a double door more dangerous than on a single door?
A double door is heavier and often runs on two torsion springs, so the load on the remaining hardware is greater if one fails. We quote both springs replaced together from $320 to keep the door balanced on both sides.
Can I drive my car out if the garage door will not open because of a broken spring?
Only if the door is already open. Don't force a closed door up to get the car out. Leave the car where it is and call. Working the door by hand or by opener can let it drop or pull a cable off its drum.
Published by Coastside Garage Door
Spring snapped or stretched?
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Springs from $150 · service call from $85