I know that it can be very difficult to have issues with your garage door opener remote. There are a few basics you can check. First, be sure you have good batteries in your remotes. Once you are sure that the remotes are able to send their signal as they should the next step is to see if the receiver is getting the signal. If they work from 2 feet away and the opener works normally with the wall switch then the most likely problem is an interference in the area, such as a microwaves, cordless phone, cell phone, new eletronic devices, satellite dishes, etc.
At the circuit box, turn off all circuits except the garage door opener. Test the opener with the remote. If it works, turn on each circuit one-by-one until the unit presents the reduced range problem. When you find it you will have a short list of home appliances which cause the problem. From there, unplug everything on that circuit and re-plug one-by-one until you find the culprit. Note: the culprit might be on the same circuit as the opener (then you have to unplug everything on that circuit). Once you find the culprit, you might be able to use the appliance if you plug it into a different phase. Or, if the culprit is on the same circuit you might simply need to move it to a different circuit.
If you cannot locate any source of interference then you may need to consult a professional with a meter that can confirm the signal strength of your remotes and help pinpoint a possible source of interference. That can be a frustrating process since it may be something that takes some time and experimenting to find or even be traced to something that you can do nothing to change.
Another possibility is that you have a problem with the receiver itself. Typically that would require the replacement of the logic board to fix but you should exhaust all other possibilities first as the repair is expensive and, if there is some other source of interference, it still might not solve the problem. I hope this helps. If you need further assistance, please reply to this thread. Thank you for using Manage My Life.