If the process seems too challenging you should replace your old opener with a new gadget.
Garage door opener losing range.
Replace the battery or batteries in the remote control.
How to increase garage door opener range.
Because older garage door openers have outdated components you may have problems changing the range in an efficient manner.
A lower voltage in the battery.
Place a stepladder at the area of the garage door.
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.
Any electrical device can be the source of the problem.
Remove obstructions between the remote control and the door.
This poor range situation.
While garage door opener remote.
The batteries provide the power to send the signal.
Improve the performance of an opener and increase the range by adding an antenna extension that you can buy online or at electronics outlets.
If the range improves then the interference is coming from a device in the garage.