At some point, your garage door might stop working suddenly and fail to open as required. Such failures can be attributed to mechanical factors. While some problems can be fixed easily by a professional, others are permanent and will require you to replace the entire door. If your garage door problem can be solved by a professional technician, then request for their service. However, if your garage door is rusty and the jamming and other issues keep re-occurring, you are better off replacing it.