What are the common signs of wear and tear on garage door coils and how can they be repaired or replaced?

Common signs of wear and tear on garage door coils include visible damage such as fraying or rust, difficulty in opening or closing the door smoothly, and unusual noises during operation. To repair or replace the coils, it is recommended to seek professional help from a garage door technician who can assess the extent of the damage and perform the necessary repairs or replacements to ensure the door functions properly.