Make the symptom specific
Useful observations include a loose handle, a latch that misses the strike, a key that catches or a deadbolt that only works while the door is open. Explain whether the problem began suddenly or has gradually worsened. Do not keep forcing a key or damaged component. A clear account is more useful than a guessed part name.
Look at the whole opening
Hardware operates within a door and frame. Wear, movement or a poor fit elsewhere can affect how a lock feels. The appropriate assessment may include the cylinder, latch, strike and door position. A repair recommendation should explain which part causes the symptom and whether correcting it is within the proposed scope.
Compare repair and replacement
Keeping suitable hardware can be sensible when a repair addresses the actual problem. Replacement may be necessary when components are damaged, incompatible or no longer appropriate. Discuss fit, finish and the key arrangement you want to retain. If the work needs a different trade or specialist, that should be identified before you agree to an unsuitable replacement.
Test under ordinary use
Check the repaired opening in the way you normally use it. Close the door, operate the lock and try each agreed key without needing unusual pressure. Ask which symptom was addressed and whether anything remains outside the completed work. Retain the invoice and clarify any applicable follow-up terms before the visit concludes.

