HOW TO HACK A COKE MACHINE
* This only works for Coke machines, which may sell products such as Barq's Root Beer, Sprite, Dasani, Evian, Fanta, Fresca, Frutopia, Powerade, Hi-C, Minute Maid, Nestea, Odwalla, Mr. Pibb, Planet Java, Power Ade, Seagram's Ginger Ale, Simply Orange, Sparkletts, or Tab in addition to Coke and Diet Coke.
* In general, these are the only options you can access without having the door unlocked and open. Different machines may list these options in somewhat different formats, so experiment a bit to learn what each new one does.
* If you need to exit the menu quickly (i.e. when you just can't wait another second to buy an ice cold Coke) press the change (coin return) button. This will normally quit the menu.
* On some machines, holding the coin return button will display the machine's inner temperature.
* Vending machine owners or service people have the option to change the access sequence from 4231 to some other combination of buttons, but they rarely do. This is probably because having one code makes it easier for anyone to service all the machines along a route. It may also be because the information you can access through the external menu with the door closed is limited and fairly harmless.
* There are several videos available on the Internet that show people using this hack. Many claim to be able to change prices or get a free drink, but the videos don't actually show them doing so.
* In order to get to the same menu in a machine that sells Pepsi products, simply enter 1,3,2,4. All the menu options should be the same. (This does not seem to work on all Pepsi machines)
* This might also work on some Coke vending machines that have a numeric keypad instead of buttons for specific drinks. Enter in the Coke code as usual, and you'll get to the sales menu!