Observe the opener operating controls and safety networks. The controls (button and external remote control) should be at least five feet above the floor (so small children cannot reach them), and should be within sight of the entrance. The reversing sensors should be no throughout six inches above flooring at spare on both of the entranceway. The emergency release cord should be attached towards the trolley disconnect and hang no under 6 feet above flooring.
Having resources and understanding how to use them are two very various things. For many people wielding a spanner is an unfamiliar if not totally alien experience (and being told