Look, don't touch
What you can check safely
These are observations, not instructions to dismantle the door. If anything looks unstable, skip the checks and call.
- 1From floor level, look for a visible spring gap without touching the assembly.
- 2Note the position of the door and whether a vehicle is trapped.
- 3Leave the opener off if it strains; do not repeatedly try to lift the door.
- 4Do not lift a heavy door manually or stand beneath a partly open door.
How we fix it
Repair details
Why the spring matters more than the motor
The spring system counterbalances the weight of the door. When a spring breaks, that counterbalance is lost or reduced. The motor may still make noise, but asking it to lift the unbalanced door can put extra stress on the drive system and door hardware.
A spring replacement needs to match the actual door. Looking like the old spring is not enough. Door weight, height, drum configuration, and the existing spring arrangement influence the correct selection. Installing an unsuitable spring can leave the door overpowered or too heavy.
Torsion springs and extension springs
Torsion springs commonly sit on a shaft above the door and provide lifting torque through drums and cables. Extension springs commonly stretch along the horizontal tracks. Both systems operate under substantial stored energy and require the correct parts and setup.
For an extension system, the technician should evaluate the retaining or safety-cable arrangement as well as the springs. For a torsion system, associated bearings, drums, shaft, and lifting cables may need inspection. A broken spring is a reason to assess the complete lifting system.
One spring or both, and what does cycle life mean?
If a paired system has springs of the same age and usage, discuss the condition of the unbroken spring before deciding whether to replace one or both. Replacement of both is not automatically necessary for every door, but it can avoid a second failure when both have similar wear.
Cycle ratings describe an expected number of opening-and-closing cycles under specified conditions, not a guaranteed number of years. Ask which spring option fits your door and usage, what the quoted rating means, and what warranty terms actually apply.
Be informed
What to discuss with your technician
- Confirm the spring type and door requirements.
- Inspect cables, drums, bearings, and related hardware.
- Replace the failed spring with a suitable component.
- Verify door balance and opener operation after replacement.
What affects the cost?
Cost depends on spring configuration, door weight, the replacement specification, and any associated damage. Request the installed price and a clear explanation of whether one or both springs are included. Do not compare quotes by spring count alone.
Before you call
Report the bang or visible gap, door size if known, and whether the door is closed or partly open. Do not remove spring pieces or alter the mechanism before the visit.
FAQ
Common broken spring repair questions
Safety references
General safety guidance: DASMA garage door safety and opener safety. For procedures specific to your equipment, use its manufacturer’s manual. These references do not imply an affiliation or certification.