What are the common signs of wear and tear on garage door tension springs, and how can they be safely replaced?

Common signs of wear and tear on garage door tension springs include visible gaps or breaks in the spring, difficulty opening or closing the door smoothly, and loud creaking or grinding noises during operation. To safely replace tension springs, it is recommended to hire a professional garage door technician who has the necessary tools and expertise to safely remove and install the new springs. Attempting to replace tension springs without proper training can be dangerous and may result in injury.