Repair, rekey and replacement address different problems. Identify what has changed before buying hardware or repeatedly forcing a difficult key.
Notice when the symptom occurs
Check whether the key turns when the door is open, whether the latch moves, and whether the problem appears only when the door is shut. Those observations help separate a lock problem from an alignment issue.
Repair when the hardware still fits
A worn or loose component, sticking latch or alignment fault may be repairable. The right fix depends on the lock and door, so describe the symptoms instead of guessing at a part.
Rekey when key control is the issue
If the lock is compatible and working but old keys should no longer operate it, rekeying may be an option. It changes the working key and does not automatically replace the hardware.
Replace when condition or fit calls for it
Replacement may make sense when the lock is damaged, worn, incompatible with the opening or no longer meets the intended use. A technician can explain the available hardware and scope before work begins.
Avoid making a small problem worse
Do not force a key that is binding or apply an unknown product to the lock. Follow the manufacturer’s maintenance instructions, and stop if operation gets worse.
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