Wcchuckers stated the solution unplugging the garage door opener is the trick.
My garage door remote opens two doors.
Examine the garage door opener button.
These remotes have three positions allowing you to open as many as three doors from one remote.
Reconnect your machine to power then clear its memory and reprogram all remote controls.
The button can easily get dirty and stuck in the pushed.
It all depends on the configuration but you likely have a button that activates the door operator.
When i press the wired button to my new liftmaster it sometimes not always will open the other garage door that has the old opener as well as the liftmaster door itself.
The door operator button is similar to a door bell.
If this does not fix the situation then you may need to replace the garage door opener or the circuit board to get to a different frequency.
The remote then transmits the code.
To troubleshoot the garage door opener button make sure it s clean and free of debris.
I pressed the desired homelink button and the correct button to the garage door opener.
Problem here is that it opens the second garage door opener just fine for a day or so.
Unplug the device for a second time and reconnect the control wiring to the motor.
Then within a couple of days open close the garage door a few times with it it starts opening the first door.
It s a really a bummer we click it to close the second door and at the same time the first door starts to open.
Unplug the opener and disconnect the two wires from the motor.
In order to fix this you ll want to make small changes to the close limit setting until the door opener knows to stop once the door has reached the floor.
Quickly test the quality of your opener s wiring by following these steps.
During this process the two door openers might get confused.
The other garage door is an old opener probably pre 1993 and has worked fine until now.
After resetting my linksys hold down button 1 and 3 until it blinks.
I used only one remote to program both buttons.
The remotes transmits a code to the receiver on the power head then the receiver sends a signal back asking for a code from the remote.
When this happens the two do not always open at the same time.