Since it can operate up to 3 doors with the 3 buttons somehow it is learning both doors and when you push one button the remote thinks you are pushing two.
One remote opens both garage doors.
This is not a common problem at all but it could happen.
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Some garage doors have infrared sensors that shoot an invisible beam across the door.
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Disconnect the control station.
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If this solves the problem then the control station is faulty or there is a short circuit in the wire.
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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.
Remove the bell wire from the single button control station s terminals and operate the garage door opener from the remotes.
When your liftmaster garage door opener opens and closes by itself here are the troubleshooting tips you need to follow.
Try using your remote to open or close your door to determine if the reprogramming was successful.
If they are working correctly the problem might be because of the safety sensors.
As most garage door remotes work only about 20 feet from the opener this unit will make it so you can open your garage from up to 100 yards away.
The only thing i can think of is that the handheld remote used to program the explorer if it is a 3 button remote has to be shorting out inside.
Then within 30 seconds hold the button on your remote for three seconds or until garage door opener s lights flash or the led light on your opener blinks.
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