dead bolt will not operate unless key is in

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The Schlage full size interchangeable core (FSIC) prepped B560F, B561F, and B563F deadbolts all require a UL fire cup (R) in order to be UL listed.  This fire cup is s...
This is usually caused because the wrong tailpiece is being used on non-IC cylinders or the incorrect driver for IC options. Use the below descriptions to identify which they need.NON-IC: There are...
After rotating  the key to unlock the lock, you must return the key to its normal position to remove it. 
The lever may be missing the slot feature for the core locking lug.  Verify slot is in place.
The AL53 and ND53 is not designed to be locked from the outside with a key. Key operation: When the button is pushed then the key will unlock the outside lever. When the button is pushed and...
The Schlage AL-Series SFIC locks require one (1) small format spacer (D500-000) for 7-pin cores and two (2) small format spacers for 6-pin cores.  When these spacers are not ins...