What rekeying changes
Rekeying changes the key that operates a compatible lock while leaving the existing hardware in place; it can be worth discussing when you want a different key to operate the lock
The lock condition and hardware type matter; share what changed and describe the lock so the request is clear
When to discuss replacement
If the lock or deadbolt is damaged, loose or difficult to use, describe those issues when you call; deadbolt Installation is a listed residential service
Describe the door and existing hardware so the request can be understood before service is discussed; the right service depends on the door and lock