Chamberlain is home security company owned by Duchossois Industries, an American-owned consumer product company based in Elmhurst, Illinois. Chamberlain makes many garage door opener mechanisms used to open your garage door automatically from inside your car or via a keypad. It is good practice to change your garage door opener code periodically to ensure only authorized people have access to your home. Allow approximately five minutes for this task.
Flip open the cover of the keypad and enter your four-digit garage door code.
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Immediately press and hold the "#" button. The opener light will blink twice. Release the "#" button.
Carefully enter your new four-digit code. Press "Enter." The lights on the motor unit will flash to confirm the new code.