It’s a frustrating scenario. You get home after a long day at work, pulling up into the driveway. You press the open button on your door opener remote and wait. Nothing happens. The garage door remains firmly shut. You press the button again, harder this time, but still nothing. What’s going on? You might even get out of the car, thinking that the batteries in the remote are weak and you need to get closer to the opener, but it does no good. Your heart sinks as you realize the truth – you’ve got to reprogram your LiftMaster or Chamberlain garage door opener.