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Release garage door spring.
When the spring unwinds the energy is released causing the door to rise.
Hold the garage door in this position by attaching a c clamp to the track at a point below the lowest door roller wheel.
However when you need to get your car out of the garage it may be necessary if you cannot wait for the repairman.
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Mounted horizontally above the opening garage door torsion springs are twisted as the door goes down storing energy in the process.
You must release the tension on the garage door springs before attempting adjustment or replacement.
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A garage door should not be opened until the spring is repaired.
To remove extension springs open the garage door all the way and attach c clamps or locking pliers to the tracks on both sides to prevent the door from rolling down once the springs are removed.
Extension springs are the most common type of garage door spring for residential use and can break after excessive usage.
If you have torsion springs call a garage door professional to have the springs unwound safely.