Therefore if someone pushes & holds the lock button by mistake while trying to open the door this function will be turned on. If you can see the light flash on the keyless entry keypad outside your garage then the issue is not likely to be a battery. Interference caused by the surface that the keypad is mounted on. If the Pushbar LED indicator on the door control unit is blinking, then the door lock feature is activated. I recommend you read it here. In other words, you have a programming related issue. If you have a 3-button wall panel (push-button, light, & lock) you simply push & hold the lock (padlock symbol) button for approx 10 seconds until the LED quits flashing. The LED should stop flashing. Liftmaster garage door opener keypad universal keyless entry garage door inters and keyp belt drive wi fi garage door opener Klik2u P2 Original Er Universal Wireless Keypad ChamberlainOutside Keypad ProgrammingHow To Program Garage Door Keypad Without The CodeProgramming Liftmaster KeypadLiftmaster 66lm Wireless Keypad For Garage Door OpenerHow To Change The Code On Your … Today it quit opening the door. When the keypad is not lighting up, this could very well be an indication that the battery is no longer working. In this case, you will want to see if it’s in fact the surface that is the issue. My Liftmaster Security + keypad has worked well for 7 years. The first thing to look at is the battery – if the keys are still back lit then there is the power to the unit. To deactivate it, hold the lock button for about 3 seconds. Typically the lights flash like that when trying to synchronized signals during programming. If you have a LiftMaster keyless entry system and the keypad is not working there are easy fixes that you can look at yourself to fix your LiftMaster keypad. A … You can put in the code and it will close the door but won't open it. Reprogram the remote control: We have a dedicated guide on how to program all Liftmaster remotes to the garage door opener.