A garage door opener is an electric device that opens and closes a garage door with a remote, keypad, wall switch or combination of all three. In general, most of these devices are chain-driven, although some are belt-driven. After the initial installation, the remote opener is programmed by the installer. However, the remote's batteries will become weak over time and must be replaced. Once you've replaced the batteries, you'll need to reprogram the remote.
Open the garage door with the wall switch. Place a ladder or step stool under the garage door opener. Put the garage door opener remote in your back pocket for quick access during programming.
Locate the "Learn" or "Program" button. This button is typically located on the back of the opener and is usually red or black.
Depress the "Learn" or "Program" button on the opener for 10 to 15 seconds. On some models, the door opener lights will blink; on other models, the button itself will blink, indicating programming is ready. You will have approximately 30 seconds to program the remote.
Climb off the ladder or stool and walk to the driveway. Face the garage door and point the remote at the door opener. Depress the "Open" button for 10 to 15 seconds. The door opener's lights will blink, or the "Learn" or "Program" button will blink or stay on, indicating the remote has been programed.
Depress the "Close" button on the remote to test it. Next, depress the "Open" button to confirm the remote has been properly programmed.