The problem is that one of the garage doors "catches" (i.e. stops) while going up at about 2 feet off the ground ~90% of the time. When the button is pressed again, it goes all the way down. This cycle can be repeated ad nauseum, or I can give the door a gentle tug upward just before the "Sticking" point, and this will give the door enough "impetus" to make it all the way up. http://m.youtube.com/watch?feature=player_embedded&v=Z_eZc-kh40c
The national average for garage door repair cost is between $80 and $110. Some of the factors that affect your garage door repair cost are the type of springs (most often torsion or extension), the size and weight of the door, and the door material. Many garage door pros will charge a service fee to visit your house and determine the problem. Often, the service fee includes a set amount of labor. One example of this is an $80 service fee that includes the first hour of work plus testing and inspecting your garage door and garage door opener, while another pro may charge $150 for the same standard service call.   
Roller doors ("Sheet Doors"-USA) are usually constructed of corrugated steel. They evolved from cover window and door coverings.[4] Other materials can be used (e.g.; transparent corrugated fibreglass) where strong impact resistance is not required. Corrugations give the door strength against impacts. A typical single car garage roller door has a preloaded spring inside the rolling mechanism. The spring reduces the effort required to open the door. Larger roller doors in commercial premises are not sprung (except USA) and use a manual pulley and chain system or a geared motor to raise and lower (roll up and roll down) the door. Roller doors cannot be effectively insulated.
Nate was very courteous and professional and called to let me know that he was about 30 minutes from my house. I had purchased a new Sears garage door opener, but when Nate arrived at my home, he inspected the existing unit and told me that it was still in good shape except for a worn out part. Nate procured the new part and brought it to my home this morning. The unit was repaired in about 10 minutes! The existing unit was just over five years old, so I'm glad I will get some more use out of it.
The national average for garage door repair cost is between $80 and $110. Some of the factors that affect your garage door repair cost are the type of springs (most often torsion or extension), the size and weight of the door, and the door material. Many garage door pros will charge a service fee to visit your house and determine the problem. Often, the service fee includes a set amount of labor. One example of this is an $80 service fee that includes the first hour of work plus testing and inspecting your garage door and garage door opener, while another pro may charge $150 for the same standard service call.    https://m.youtu.be/Z_eZc-kh40c
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