Springs should never be adjusted or repaired by individuals who are not properly trained to perform this task and may not have the proper tools. Continuing to operate your door with a broken spring is very dangerous and can cause additional damage to the garage door and electric opener systems. A spring replacement is one of the most common repairs required on a garage door. These springs come in varying sizes and act as a balance, lifting most of the garage door weight. This allows the door to easily open and close manually or with the assistance of an opener.