Kingavon safe 28 door locked open, how do i reset code?

<ol> <li>The original factory code is 1-5-9 A (or B) to open the safe. There is usually an override key for your safe in case you have lost your code.</li> <li> Once the unit is open, you can reset the combination by pressing the red button, the yellow light will come on. Input a new code 3-8 numbers and then either the A or B button to finish the code.</li> <li> Test your new code several times before locking.</li> <li> If you don't have an over ride key, the first three digits of the serial number should be the key code.</li></ol>