What is a garage door spring?

A garage door spring helps counteract the door’s weight so it can open and close in balance. ANSI/DASMA 103-2017 describes extension systems that stretch springs and torsion systems with shafts and cable drums. If a door binds, sticks or loses balance, CPSC calls for professional service.

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By InstaBids editorial team with AI research agents. Updated 6 November 2026

What this means for your home project

Check your opener’s user manual for its balance guidance before deciding how to assess the door. Source: U.S. Government Publishing Office, read 2026-11-06.
Record any binding, sticking or loss of balance for a service visit; these are CPSC’s reasons to seek professional attention. (source)
Request a written scope identifying repairs to the spring assembly, cables and other hardware; ask which items the service person will repair. Source: U.S. Government Publishing Office, read 2026-11-06.
If an opener installation is also planned, request the cable, spring and hardware repair scope before that installation. Source: U.S. Government Publishing Office, read 2026-11-06.

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What types of garage door springs are there?

Garage door springs use an extension system that stretches a spring through pulleys, or a torsion system using a shaft and cable drums. ANSI/DASMA 103-2017 describes counterbalance force as "approximately equal" to door weight (read 2026-11-06). Both systems use lift cables. (source)

“Force of the counterbalance approximately equal to the weight of the garage door.” (source)

How do I know if my garage door is balanced?

Garage door balance means the door can "stay in place" when stopped partway open, according to CPSC (read 2026-11-05). A door that binds, sticks or fails to remain balanced needs professional service; a severely unbalanced door could fall onto someone below it. (source)

“This means that the door will stay in place when stopped in any partially‐open position.” (source) “A severely unbalanced garage door could unexpectedly crash to the floor possibly striking someone under the open door.” (source) “If doors are not "balanced," or if they bind or stick, they should be serviced by a professional.” (source)

Can I replace a garage door spring myself?

Garage door spring repairs belong with a "qualified service person" under the federal operator user instructions in 16 CFR section 1211.16 (2024 edition; read 2026-11-06). Those instructions cover spring assemblies, cables and other hardware, and warn that an improperly balanced door can cause severe injury or death. (source)

“Have a qualified service person make repairs to cables, spring assemblies and other hardware.” (source) “An improperly balanced door could cause severe injury or death.” (source)

Can I open a garage door with a broken spring?

Weak or broken garage door springs may let the door fall rapidly. Federal operator instructions warn of "injury or death" and say to use the emergency release, if possible, only with the door closed, with caution if open (2024 edition; read 2026-11-06). (source)

“Weak or broken springs may allow the door to fall rapidly, causing injury or death.” (source) “For products requiring an emergency release, if possible, use the emergency release only when the door is closed.” (source) “Use caution when using this release with the door open.” (source)

How often should garage door balance be checked?

Garage door inspections should happen "every 30 days", says CPSC’s homeowner alert (read 2026-11-05). The interval covers the garage door and its opener together. The alert also calls for checking hardware and fittings to keep the door on its track. (source)

“Inspect the garage door and the garage door opener every 30 days to make sure they are working properly.” (source) “Hardware and fittings should be checked to keep the door on track at all times.” (source)

Sources

ANSI/DASMA 103-2017: Counterbalance systems on residential sectional garage doors — DASMA; published 2017; read 2026-11-06.
Non-Reversing Automatic Garage Door Openers Are a Hazard, Pub. 523 — U.S. Consumer Product Safety Commission; published 2011-04; read 2026-11-05.
16 CFR section 1211.16: Instruction manual, 2024 edition — U.S. Government Publishing Office; published 2024-01-01; read 2026-11-06.