Major problems like spring replacement and door installation will need the attention of a reputable door firm. Since garage door is probably the heaviest moving part in your home, cases of accidents can be easily reported. Meaning that you can't manage to fix it yourself, therefore you will have to contact a professional to do it for you. The advantage of a hiring a professional is that they have all the equipment and knowledge of handling dangerous parts of the door. They also have sophisticated tools to detect other problems that your bear eyes cold not see. But on the other hand, hiring a professional is very expensive and sometimes their fee may not be within your budget.