Check the following:
Debris in the cylinder
The cylinder cap could be too loose
Incorrect pinning of the cylinder
The cylinder plug is not returned to the neutral position with the cylinder s...
The Monarch KIL trim uses the following cylinders: Schlage Cylinders 23-013 Conventional 20-750 Primus 20-750-XP Primus XP 20-550 Primus UL437 20-550-XP Primus UL437 XP Falcon Cylinder A23165-0...