Originally each garage door worked with it's own transmitter. When one side got to full to park in I reprogrammed that transmitter to work the other door. This way I kept a transmitter in each car and could open the door from which ever car I was driving.

On both receivers I set the pins the same so when I tested the transmitters at least one should have opened. Since neither opened I assumed it was the transmitters, until a new one came today and they still don't open.

Barry