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Garage door opener weak signal.
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.
Move closer to the door.
Oftentimes when your garage door opener remote stops working it is because the remote transmitter has lost its signal with the motor.
The remote control unit for a garage door opener works by transmitting a radio signal to the unit inside the garage.
It s possible you are out of range of the antenna inside the garage.
The remotes work by electronically sending a signal to the motor inside your garage allowing you to open and close the door.
It flashes because it s hearing the radio signal from your transmitter remote.
Anyone who is familiar with automatic openers may realize the remote doesn t.
Any electrical device can be the source of the problem.
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.
Make sure that the antenna on the motor unit is hanging downward and is not damaged in any way.
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.
If the range improves then the interference is coming from a device in the garage.