First do not try to lift the door by hand or using the opener as you can hurt yourself lifting a heavy garage door by hand and burn out the opener using it to try to open a door with a broken spring.
Broken torsion spring garage door.
If you have a wayne dalton torquemaster system pictured below the springs will be inside a tube.
You will have to look up at the springs to determine if one is broken.
A garage door that has a broken spring has nothing to support its weight.
This video will show you how to open a garage door if one of the torsion spring is broken.
A garage door should not be opened until the spring is repaired.
The size of the door and the type of spring system determines how difficult opening the door will be.
If your garage door has two torsion springs the second spring will keep the cables tight and on the drums.
The springs used by our competition range anywhere from 5 000 10 000 cycles whereas we use a high grade steel spring rated for 25 000 50 000 cycles.