Re align them by moving one of them until the red light stays lighted.
Garage door one light red one green.
If getting debris away from the door makes no difference then there s more to the story.
I put a new battery in the remote too.
If just the red source led is out unplug the mechanism check the wiring and plug it back in.
These sensors are little black boxes found on either side of the bottom of the garage door.
Many times the malfunction can be due to a loose connection or broken wire.
If both the red source and green sensor lights are on and not blinking then the door mechanism is working properly.
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.
If one or both of the lights are off check the fuses breakers and plugs for problems.
And when they re blinking they re flashing a warning to the homeowner that something needs to be corrected.
Each sensor will usually have a light.
My genie garage door won t open.
I ll do all i can to help.
Raise the garage door using the control button on the garage wall or the remote control unit from a vehicle.
I moved the red one and the red light stopped blinking but the door still won t open.
Sweep the garage floors and look through the sidings to ensure that there are no objects to obstruct the door.
Genie garage door opener with the red green light for detecting something in way of door closing.
How long have you been dealing with this.
Inspect each sensor to make sure the green or red power indicator lights are.
One sensor is red and one is green.
That there are no obstructions.
Door starts down abruptly stops goes back up.
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.
Red sensor lights are an issue because they should generally be green.
If the red light is blinking the sensors are not aligned.