If even once you’ve experienced a malfunctioning garage door opener, you know how frustrating it can be. Luckily, those openers from LiftMaster, Chamberlain and Craftsman manufactured after 2012 can help you pinpoint the problem using flashing indicator lights. These more recent openers come with the Security+ 2.0 system and MyQTM technology. To make sure this is what you have, there is a yellow LEARN button on the back or side of the motor housing.