This is one of the sensors.
Garage door will open but not close with my opener.
So there you have it.
You might have absentmindedly unplugged the operator as you were exiting the garage through your internal door to the house.
If there is an issue with the safety sensors and the door is unable to close normally this will also cause an issue closing the door from the app.
In the funniest of scenarios the problem will simply be due to an unplugged power cord.
Depending on the brand.
First check the sensor lights.
Clutter or obstructions that block the sensor are the first problems to look for if your door won t close or in extreme cases open at all.
One sends a beam of infra red light to the other.
If anything interrupts this beam of light the garage door will not close and the ceiling light on the opener mechanism will flash as mentioned in the previous step.
If your garage door opens ok but won t close then it s possible the safety reversing sensors are not correctly aligned.
Loosen the receiving eye wing nut and adjust sensor until it receives the sender s beam.
I have had to resort to disengaging the chain assembly with the lever and have opened the door manually.
If your garage door opener no longer has power the wi fi hub will send a command to the garage door opener.
When i push the remote in my vehicle to close the garage door it will close and remain closed for about a second and then it will open up again.
Sometimes a garage door won t open or close for one reason only the operator has no power connection.