If this is the reason you will need to reengage the carriage.
Genie garage door transmitter not working.
If an operational problem exists and the garage door opener will not close the opener can be forced to close.
Press the learn button on your garage door motor to reset the current codes and transmitters and wait for the red indicator light to begin blinking.
Door starts down then stops before it is closed.
The button is near the antenna wire on the back of the system.
Press and hold the wall console button until the garage door is completey closed.
The transmitters remotes will not work to close the garage door.
The most common reason for a garage door remote transmitter to stop working is a dead battery.
The method to reengage the carriage depends on the model of garage door opener you own.
Step 2 press the open button on your remote transmitter three times while inside of your garage and pointed at the motor.
Your garage door may be disconnected from the opener.
You will find that the door will only move an inch or so in the close direction and reverse.
Check garage door for binding.
The problem is either due to a blocked path between the sensors dirty eyes loose wires at the sensors or at the motor head or just bad sensors.
However if all the garage door openers stop working at the same time then most likely the garage door antenna is not attached properly or the garage door opener itself needs to be reset.