Where does it catch?
Notice what you already experience during normal use: does the key resist going in, refuse to turn or turn while the door stays shut? Does the latch miss when the door closes? You do not need to take the lock apart or repeatedly test a door that is becoming difficult.
The guide to a lock that only sometimes works helps organize those observations. Mention whether one key behaves differently from the others and whether the problem is new. These details support a conversation about assessment; they are not a diagnosis by phone.
The entrance has its own story
Ferris's downtown has a grid of shops and restaurants with older residential areas nearby. A home entrance and a shop's everyday pedestrian door may both develop key problems, but they serve different routines. Say whether the immediate concern is getting in, locking up or avoiding an unreliable key.
For a home, explain which entrance still works. For a shop, say who can approve work and whether the door can currently be secured. Lock repair starts with the condition you describe; it should not be confused with changing keys simply because a copy is missing.
Decide what needs to change
If the lock works smoothly but you no longer know who holds a key, the question is access control through the existing mechanical lock. Discuss rekeying suitable cylinders as a separate aim. If the key catches, include that fact even when you also want different keys afterward.
For location, use the street address and actual entrance. FM 664 and 6th Street can help orient a Ferris conversation, but not identify a particular door. The pricing page outlines the questions to ask about assessment, the proposed work and any change in scope before authorizing it.