Our Repair techs have substantial levels of experience. We always have the parts you require available on every truck so we will not need to trouble you a second time to obtain your Garage Door running right. Garage Doors weigh numerous pounds. The complete weight of the Door is carried by the Garage Door hardware, such as the Springs, Cables, Rollers, Bearings, etc. This hardware has an useful life span of about 5-10 years before it compromises and overburdens the Garage Door Opener, eventually causing it to break or stop working. The Opener is not developed to do any heavy lifting, that is the job of the Door hardware. A simple test to see if your Garage Door hardware is doing its job is this: With the Door in the fully closed position pull down on the red detach cord. Then attempt raising the Door. If the Door is very heavy and drops of its own weight when you let go the Door Springs and hardware are used and are not doing their job, putting undue strain on the Opener. Serving San Francisco CA and surrounding areas.