Finally, one of the most important garage door innovations over the years in increased child safety features. Sensors can detect when a child or pet is crossing the threshold while the door is closing, prompting it to stop immediately. Furthermore, doors can also sense when something is being pressed by the door, causing it to stop before inflicting a brutal crushing injury.
Most homeowners never know they have a broken garage door spring until they try to leave their home. You go in the garage to open the door, push the wall button, and the door only goes up 6”. The reason for this is the garage door opener force or sensitivity has activated, causing the opener to stop pulling the door up. This is a safety feature built into most garage door openers. It is actually a good thing when the open force activates to prevent any damage to your garage door or opener.
4.4 Take the spring on the left and place it at the left end of the door as pictured here. Notice that the end of the wire points to the right toward the center of the door. This is a right wind torsion spring. It will go above the garage door on the left side of the spring anchor bracket. The winding cone at the other end of this spring is usually painted red.