Check to be sure the antenna is attached and if it is not hanging down from the unit move the antenna so it can catch the beambeing sent by the remote.
Garage door remote control signal issue.
Many different electronic devices can cause radio frequency interference which will reduce the range of the garage door opener remote or cause it to work intermittently.
If the remote works from inside the garage but not from the outside then most likely the antenna wireon the garage door opener itself may be damaged broken or not in visible range.
In order for the remote to be able to open the garage door the signal from the radio transmitter must be strong enough to reach the radio receiver in the garage.
Simple but true the remote transmitter needs power to send a signal to your opener.
Try replacing the batteries in the remote and trying again.
To be sure that the batteries are always good use name brand quality batteries instead of discount brands.
Most likely this will resolve the situation.
If they are working correctly the problem might be because of the safety sensors.
It flashes because it s hearing the radio signal from your transmitter remote.
The garage door remote won t work but the wall switch does check the batteries and electrical connections in the remote to make sure they are working correctly.
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.
Some garage doors have infrared sensors that shoot an invisible beam across the door.
Step by step process of elimination is the best way to determine what is causing the decreased range on the garage door opener remote.
Two common causes for a signal interruption is if your remote is out of range or the opener receiving antennae is damaged.
In the case that the door responds to the switch then there s a good chance it s the remote that has an issue.
If you watch that little light while you push the button on your remote you will see it flash.
As if that weren t enough the radio receiver also has to be able to pick out the signal through all the other radio frequency noise in the area.
However if it doesn t then you may need to replace the remote altogether.