Springs usually go in pairs
On doors with two springs, many technicians recommend replacing both at once, since they've worn at the same rate.

A door that won't open, a loud snap from the garage or a car stuck inside. Tell us what's happening and we'll help you reach independent garage door technicians who serve your area.
A door that won't close leaves the house less secure, and a broken spring shouldn't be forced.
If there's fire, a gas smell or any risk to someone's safety, leave and call 911.
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On doors with two springs, many technicians recommend replacing both at once, since they've worn at the same rate.

A few quick answers and you're done. You decide who to talk to.
Get Garage Door HelpMisaligned safety sensors are one of the most common causes. Check that both sensor lights are on and nothing is blocking them.
It depends on what's wrong, how big the job is, access, materials and local rates. Independent pros set their own prices, so ask for a written estimate — and what could change it — before work starts.
It depends on your area, the time of day and how busy local pros are. Say that it's urgent when a pro contacts you, and follow the safety steps on this page in the meantime.