Broken Garage Door Spring
Given their notorious power, one could hardly be expected to foresee the notion of a broken garage door spring. However, that sometimes happens as a result of wear and tear. The springs are quite durable and can last for many years with light use but in the same vein they can break down due to faulty installation or even hard use.
Avoid Replacing the Spring On Your Own
Both torsion springs and extension springs carry the weight of the door, and this tension could be fatal if released suddenly. It is recommended to avoid independent spring replacement, as it can risk one's life in case the door collapses, or the spring might pop out and hurt anything and anyone in its way. A spring replacement must be performed by an experienced professional, who could replace it safely and correctly. He must know the right size and brand, and make sure that the other spring is not about to break as well.