Thanks for your reply-

This sounds like my first opportunity to delve into the door handle lock/alarm combination...

Do you have any idea how the alarm is integrated with the door handle lock? Does it seem feasible that the alarm enabling/disabling would be okay while the actual moving of hardware (disengaging the door's lock) would fail? Another way of saying that is: If the tumbler were failing, wouldn't the lock *and* the alarm both malfunction? Thus I'm wondering how the alarm integrates with the door handle lock...

Thanks you for your help and insight!

Terry