Whether you have a belt drive, chain drive or wall-mount model, find helpful resources – manuals, videos and more – to help you diagnose and fix the problem. Changing codes completely. When the motor unit's light begins blinking, release the remote button. Get the LiftMaster garage door support you need from Chamberlain Group. LiftMaster Garage Door Openers Troubleshooting & Support. The emergency release cord is the red rope that hangs from the … A code is preset on the motor so the door operates the first time you use the remote. Press and release the "learn" button on the opener's motor unit. The garage door motor is a roughly 8 in × 5 in (20 cm × 13 cm) box mounted to the roof of your garage. Liftmaster garage door openers come with a remote for operating the door from a vehicle. Pull the Emergency Release Cord. Note that different garage door openers are reset differently. Here are the steps to follow in resetting your garage door within 60 seconds: Garage Door Openers with Keypads. Then, climb up the ladder until you can comfortably reach the garage door motor. This can be useful when trying to move the device to a new account without having access to the myQ account that the device is associated with. During those 30 seconds, press down and hold the "learn" button on the handheld remote control you want to use to operate the garage door. Set up a ladder beneath the garage door motor in your garage. The button's indicator light will illuminate continuously for 30 seconds. A factory reset will remove a garage door opener from a myQ account once the device is powered up and reconnected to Wi-Fi. Open the ladder by pulling the 2 metal halves apart from each other and pressing down on the 2 cross-beams. This depends on the type of garage door opener that you have and its manufacturing date. You might need to change the code on your LiftMaster garage door opener either because you need to update your security or you lost a remote control. Whichever the reason is, here are the steps that you need to take in order to change the code on your opener.