To change the combination on your Kidde 001371 S6 S6 KeySafe, follow these steps: Open the lock box using the current combination. Locate the arrows on the sliders. The arrows pointing downward indicate the current combination. Use the provided tool (usually a small screwdriver) to push and turn the arrows upward to reset the combination. Set your new combination by turning the arrows to match your new code. Test the new combination to ensure it works correctly. Cover the sliders with the cap to prevent accidental changes