It s possible you are out of range of the antenna inside the garage.
Garage door opener weak signal.
Anyone who is familiar with automatic openers may realize the remote doesn t.
The remote control unit for a garage door opener works by transmitting a radio signal to the unit inside the garage.
To isolate potential sources of interference turn the circuit breaker off to the garage and plug the garage door opener into an extension cord from another room.
On most of the newer garage door openers there is a little led light next to the learn button on the back of the opener.
Move closer to the door.
Troubleshooting a lost signal on your remote is as easy as resetting the old signal on the motor opener and equipping your transmitters with new signals.
It flashes because it s hearing the radio signal from your transmitter remote.
Make sure that the antenna on the motor unit is hanging downward and is not damaged in any way.
Modern garage door openers are essentially small radios that operate at about 315mh and a few feet of extra distance can affect the signal.
If you have recently changed any lighting around your opener and noticed a weakening signal chances are the light bulbs are the cause.
If you watch that little light while you push the button on your remote you will see it flash.
Knock off brands seem to be the main culprit in weakening your garage door opener signal.
The remotes work by electronically sending a signal to the motor inside your garage allowing you to open and close the door.
Any electrical device can be the source of the problem.