Schlage sense bolt does not retract

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After installing a classroom deadbolt, there is potential for the thumbturn to project the bolt only, get stuck in one position, or move both directions but not move the bolt.  These are caused fro...
The 98/99 rim and vertical rod exit devices are shipped with NL drive screw to function as a Night Latch. To convert the device to Class Room, remove the NL Drive Screw on 98/99 center case ass...
Bad dogging hook on the dogging assembly could cause the 33A/35A and 98/99 exit device latch bolt not to retract completely.
- AD Series and CO series products require that the Night Latch (NL) screw is installed in the exit device.  Be sure this screw is installed- Exit hardware and strike must be properly mounted ...
If the 912L was shipped after February 28,  2011, Check the installation instructions, step 3 to be sure all parts are installed on the trim correctly, even if the trim was received in th...
Latch retraction issues at time of installation could be caused by incorrect handing of the lock chassis.  Move the driver to one of the following positions as indicated below:  
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...