You may be dialing the combo with one of the numbers slightly off. Stand directly in front of the dial to make sure the numbers line up with the index mark. On most combo dial locks, there are two marks on the dial ring. Use the vertical line at the 12 o’clock position.
If you experience continued difficulty, this may be a sign of a slight problem developing. Contact an Amsec registered locksmith or dealer for further help. Click here to find an authorized dealer in your area.