To reset the combination lock on Samsonite luggage, turn the numbers on the lock to the previous code or to "0-0-0," which is the default combination. Press and hold the reset button on the side of the lock.
While holding the reset button in, turn the numbers to the desired combination. Release the reset button once the desired combination is set. Some Samsonite locks have a handle instead of a button. Hold the handle down while rotating the numbers to set the desired combination. Test the new combination to see if it works. If it doesn't, repeat the reset process again. If it still doesn't work, contact Samsonite for assistance or replacement.