You may need to use a 2x4 or some other object to pry the garage door open.
How to install extension springs on garage door.
Home owners can replace an extension springs safely by following these steps.
However this requires mounting the torsion spring on the rear of the horizontal tracks.
Replacing garage door extension springs is not a difficult task provided you know all the key steps.
This can still be done when only one extension spring is broken.
Granted garage door spring installation work requires time and attention so it is best to save the task for the afternoon of a free day.
Complete instruction to repair a broken garage door spring.
Place scale under the garage door on the side of the door with the broken extension spring.
Garage doors operating with torsion springs require a minimum of 9 1 2 inches of headroom while doors using extension springs require a minimum of 4 1 2 inches of headroom.
To do this you will need to first detach one end of the spring from its mounting point at the back of the garage door rail farthest point away from the garage door opening.
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Then detach the lift cable from its connection point on the door rail near the garage door just above the garage opening and thread the loose cable around the sheave pulley attached to the spring.
It is possible to mount torsion springs in a garage with only 5 inches of headroom.
How to replace a garage door extension spring.
Tie the extension spring to the roller track then detach the cable from the bottom bracket with a pair of pliers.