my Encode lock will not unlock

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Installers have reported that their AD-CO Series cylindrical or mortise locks will unlock whenever the outside lever is lifted.    This will occur if the outside spindle (square post) is install...
The Von Duprin 7500 mortise lock body ships in the NL mode.  Either the function of 7500 lock body has not been changed to the Classroom function or the NL Drive screw is not all the way down. Step...
  Tips for changing the function: The NL Drive screw will not be visible when lock body is set to Classroom function There is locktite on the screw that makes it seem like its turned down enou...