These sensors are little black boxes found on either side of the bottom of the garage door.
Garage door one light red one light green.
That there are no obstructions.
How long have you been dealing with this.
Each sensor will usually have a light.
Door starts down abruptly stops goes back up.
Since the lack of power supply is a common problem check the wires around the sensor when the led lights are not flashing.
I put a new battery in the remote too.
Did pull screw level to see if that was an issue re engaged lever not sure if did it up or down and still same problem.
Replaced the door sensors and alignment appears to be fine as both green red lights are constant.
If getting debris away from the door makes no difference then there s more to the story.
One will have a green light that signifies power to the units and the other will have a red light that signifies that the sensors are seeing each other i e.
There usually is a light on each sensor.
Check if there are any objects impeding the door.
Red sensor lights are an issue because they should generally be green.
And when they re blinking they re flashing a warning to the homeowner that something needs to be corrected.
Sweep the garage floors and look through the sidings to ensure that there are no objects to obstruct the door.
One sensor is red and one is green.
I ll do all i can to help.
Genie garage door opener with the red green light for detecting something in way of door closing.
One will have a green light used to show that the units are powered up and the other will have a red light to show that there s no obstruction between the sensors and that they re seeing each other.
At that point a homeowner may want to try.