How can I repair a deadbolt lock that won't turn?

How can I repair a deadbolt lock that won't turn?

First, check if the key is working properly. If it is, the issue might be with the lock mechanism itself.

The key works fine, but the lock still won't turn. What should I do next?

Try lubricating the lock with graphite or a silicone-based lubricant. Avoid using oil-based lubricants.

I lubricated it, but it still won't turn. What else can I check?

Inspect the deadbolt alignment. Ensure the bolt is properly aligned with the strike plate. Adjust if necessary.

If that doesn't work, should I consider replacing the lock?

Yes, if the lock is still malfunctioning after these steps, it may be time to replace it.