How to Reverse a Door Lock

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Switch a door lock to the other side of the door.
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When installing a door lock, the keyhole should be positioned on the outside of the door so you can unlock the door with a key from the outside. However, the two sides of a lock assembly are a mirror image of one another, and any lock can be installed with the keyhole facing either direction. Any key-in-knob or deadbolt lock can be easily reversed if it has been installed improperly or you need to change the direction of the keyhole for any reason.

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Step 1

Unscrew and remove the trim screws from around the lock with a Philips screwdriver. Remove the trim if possible at this point and set aside.

Step 2

Unscrew and remove the edge plate screws from the trim around the bolt with a Philips screwdriver if reversing a deadbolt lock. Pull the trim and bolt from the door edge and set aside.

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Step 3

Pull the doorknobs or lock trim apart and out of the door panel. Replace the knobs or lock cylinder on the opposite sides of the door panel.

Step 4

Replace the deadbolt and edge plate. Replace the lock trim and all screws. Test the lock.