i have a simplex 5 buttons in a circle push button lock on my door, How do i change the combination??
Answers:
1. Open door
2. Turn outside thumbturn anti-clockwise to clear
3. Input existing combination
4. Use allen key to remove screw from top (yours may be upside down)
5. Insert allen key into screw hole until a slight click is felt
6. Remove allen key
7. Turn outside thumbturn ant-clockwise
8. Enter new combination
9. Replace screw
10. Test new combination works before closing door
Any problems just ask again, i can always e-mail instructions ;-)
Other answers:
answer as above
answer as above