Keep in mind that a long metal spring is being stretched to the point that it will lift your entire garage door which can weigh several hundred pounds.
How to replace a broken garage door extension spring.
Garage door spring cost.
Broken garage door extension springs make it difficult to open your garage door.
Repairing a broken garage door spring costs 40 to 80 for winding balancing and lubricating the springs.
Garage door spring replacement costs 120 to 350 on average.
Do not try to remove the extension spring that is not broken when the garage door is closed.
Garage door springs alone cost 30 to 100 for a torsion spring and 20 to 50 for an extension spring.