A remote control uses batteries to send wireless signals, so a dead battery may cause it to fail eventhough the door control works. Your garage door opener is equipped with an integrated receiver logic board that "listens" for your hand-held remote controls wirelessly, whereas your wall-mounted door control panel is hard-wired. The hand-held remote controls and wired door control operate independently, so it is not uncommon for one device to work while the other does not. If all remotes are working intermittently, or stop working there may be interference. There are a fewreasons for your remote control not to work: The LOCK button is ON. The battery is depleted. The remote control needs to beerased and reprogrammed. There's a short in the door control, door control wireor receiver logic board. The LOCK Button is ON The Multi-Function Door Control Panel includesa LOCKbutton. With this feature the indicator light behind the push bar will flash when the lock switch is turnedON and when you press the remote control the light bulb on the opener will flash two times. With the LOCK button activated, the receiver logic board will NOT accept signals from the remote control. The door will, however, open and close by activating the push bar, key switch or keypad. To deactivate this feature: Check for a blinking light on the multi-function door control panel. If the light is blinking, push the LOCK button to turn off the lock feature: Press and hold the LOCK button for 2 seconds, then the LED will glow solid indicating the lock feature has been deactivated. If you wish to reactivate the lock feature, press and hold the LOCK button again for 2 seconds.