Garage door: broken spring, opener problems and safety
For Silicon Valley homes · Updated October 2026 · Sources below
If the door suddenly feels very heavy or the opener strains and stops, a broken spring is the usual cause - and springs are under high tension, so leave them to a pro. In California, any new opener installed since July 1, 2019 must have a battery backup, and a replacement door can't be connected to an old opener without one.
Never try to adjust or remove a garage door spring or its cables yourself - they hold enough tension to cause serious injury. Keep children away from a door that's moving, and keep remotes out of their reach.
The short version
- Torsion springs last about 10,000-20,000 cycles (roughly 8-15 years)
- Spring repair (national): about $150 - $350
- California: new openers must have a battery backup (since July 1, 2019)
- Test the auto-reverse every month
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What it costs
- Repair or replace a garage door spring$150 - $350 (average $250)
- Install a garage door opener$218 - $540 (average $379)
A new door, a second spring or extra parts like cables and rollers add to the price.
Typical ranges from published cost guides - mostly national figures. Bay Area prices usually run higher. Your actual price depends on your home and the job, and a pro gives you the real number. Source: HomeAdvisor cost guide (national) (Jun 2026). Have a quote? Check it with the Quote Explainer
Spring or opener?
- A loud bang from the garage, then the door won't lift: likely a broken spring
- A visible gap in the torsion spring above the door
- The door is very heavy to lift by hand or slams down
- The opener hums or clicks but the door doesn't move
- The door reverses on its own or won't close: often the safety sensors are blocked or out of line
What to do first
- Don't keep running the opener on a door with a broken spring - it can damage the opener.
- Check the simple things: the opener's power, the wall switch lock, and that nothing blocks the photo-eye sensors near the floor.
- Springs, cables and their brackets are under high tension - have a pro replace them.
- If the opener is old or has no battery backup, ask the pro to price a new one along with the repair.
In Silicon Valley
- California SB 969 (Health & Safety Code §19892): since July 1, 2019, every residential garage door opener sold or installed in California must have a battery backup that works in a power outage.
- The same law says a replacement garage door can't be connected to an existing opener that lacks battery backup, whenever that opener was made. Violations carry a $1,000 civil penalty per opener.
Questions homeowners ask
Why won't my garage door open?
The most common causes are a broken spring, blocked or misaligned safety sensors, a tripped breaker or locked wall switch, or a worn-out opener. If you heard a loud bang and the door is very heavy, it's almost always a spring.
Can I replace a garage door spring myself?
It isn't recommended. Springs are under high tension and mishandling them can cause severe injury. A garage door technician has the tools to do it safely.
How long do garage door springs last?
Torsion springs are rated for about 10,000 to 20,000 cycles, roughly 8 to 15 years. Extension springs last about 8,000 to 15,000 cycles, or 7 to 12 years. If one spring breaks, it's usually smart to replace both.
Does my garage door opener need a battery backup in California?
Any new opener sold or installed since July 1, 2019 must have one. You don't have to replace a working older opener, but if you replace the garage door, it can't be connected to an opener without battery backup.
How do I test my garage door's safety reverse?
The U.S. Consumer Product Safety Commission says to test the reversing feature every month, following the opener's manual. If the door doesn't reverse when it meets an obstruction, stop using the opener and have it adjusted or inspected.
How much does garage door spring repair cost?
HomeAdvisor's national guide puts it at about $150 to $350, averaging $250. A new opener installed runs about $218 to $540. Bay Area prices usually run higher.
Questions to ask the pro
- Will you replace both springs, and what cycle rating are they?
- Is the price for parts and labor, with no extra trip fee?
- Does my opener have a battery backup? If not, what would a new one cost?
- Will you check the cables, rollers and safety sensors while you're here?
- What's the warranty on the springs and the labor?
Before you sign, check the contractor's license at cslb.ca.gov. How to hire a contractor in California
Need a garage door technician?
Tell us about the job in 2 minutes - free. We send it to one local pro at a time, never a crowd.
Related answers
Sources
- HomeAdvisor - Garage door spring repair cost guide
- HomeAdvisor - Garage door opener installation cost guide
- California SB 969 (2018) - garage door opener battery backup (Health & Safety Code §19892)
- U.S. CPSC - Final rules for automatic garage door openers
General information for Silicon Valley homeowners, not professional advice for your home. Rules and programs change - check the source, and have a licensed pro look at your situation.