Enter your current code that you want to change (factory set is 12345) and then press the button that looks like a little lock on the keypad. The red LED will light on the front code side and beep twice to indicate you are in programming mode. You will see a small light and beside it is a small SET button by the batteries, it is labelled.
Do not press a pen or anything into the small light, you do not need too.
Snap off the back cover (opposite where you punch the numbers) by pinching the sides and pulling off. Installation Guide (English) Instructions / Assembly (English).
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