How to Change a Door Lock
Quick Answer
Remove the old lock screws, extract the cylinder or mortice lock, insert the new lock, and secure it with screws.
How to troubleshoot How to Change a Door Lock
Upgrading or replacing a door lock improves security. This guide covers removing the old lock and installing a new one, for both mortice and cylinder locks.
Step-by-Step Fix
- Open the door and locate the screws on the interior side of the lock.
- Unscrew and remove the interior handle and faceplate.
- For a cylinder lock, remove the retaining screw and pull the cylinder out.
- Insert the new cylinder or lock, making sure it aligns correctly.
- Reattach the interior handle and faceplate, and secure with screws.
- Test the lock with the key to ensure smooth operation.
Common Error Codes
| Code | Meaning | Resolution |
|---|---|---|
| Key doesn't turn | Cylinder not aligned or incorrect key | Ensure the cylinder is correctly oriented and use the correct key. |
| Lock is loose | Screws not tightened or wrong size | Use the screws provided and tighten them fully. |
Frequently Asked Questions
Can I change a lock without replacing the handle?
Yes, often you can just replace the cylinder while keeping the existing handles.
What tools do I need to change a door lock?
A screwdriver is typically all you need; sometimes an Allen key for certain handles.