If you watch that little light while you push the button on your remote you will see it flash.
Garage door opener signal weak.
Multiple garage door opener troubleshooting test start by unplugging the opener that has good range powering down this unit.
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.
It flashes because it s hearing the radio signal from your transmitter remote.
The remotes work by electronically sending a signal to the motor inside your garage allowing you to open and close the door.
Oftentimes when your garage door opener remote stops working it is because the remote transmitter has lost its signal with the motor.
If the range improves then the interference is coming from a device in the garage.
Modern garage door openers are essentially small radios that operate at about 315mh and a few feet of extra distance can affect the signal.
Clip the remote control onto a sun visor in the vehicle instead of a metal ash tray or metal dash board that can.
Any electrical device can be the source of the problem.
Test the opener that has the poor range.
Before installing the extension kit move any metallic objects that may obstruct the signal between the remote control.
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.