Incorrect limit switch configurations: Garage door openers use limit switches to control how considerably the door travels up and down. If they're off, the door may well not shut completely. This manual will wander you through the method step-by-phase regarding how to established travel limits on a garage door opener, https://andresczjth.izrablog.com/38710705/not-known-facts-about-how-to-set-garage-door-opener-travel-limits