If the power goes out you still can open your garage door by pulling the release rope and manually lifting the door. Most garage door opener systems have easily accessed adjustments.   "Open sesame!" Garage door openers are the unsung heroes of modern life. Without them we would have to actually get out of the car to open the door. With them we simply push a button and drive right in—unless the opener doesn't work (or the garage is full of broken stuff). It's a good thing that garage door openers are relatively low maintenance and easy to repair. A garage door opener is an electric motor appliance that opens a garage door at the push of a button. The button can be one that's wired into the household electrical circuit or one that's on a battery-powered remote-control unit usually carried in a car. Most garage door systems have both. The button sends an infrared or radio signal to the control unit that, in turn, activates an electric motor with a track-and-pulley system that moves the door. Most garage door opener units also have a light that goes on automatically and shuts off after a pre-set interval. Garage door maintenance and repair: Inspect and, if necessary, remove and clean dirty hinge rollers with degreaser or kerosene, replacing each assembly before removing the next. Twice a year, lubricate the roller bearings and roller shaft with lightweight oil. Also remove any debris from the track. Check and adjust the door lock bar. To adjust, loosen the screws and move the lock-bar guide bracket up or down as needed. Make sure that all screws are tight. Inspect the door operation for smooth, uniform movement. As needed, loosen mounting screws and use a mallet to straighten a misaligned track.