If you have never looked into how this technology works it can seem rather complicated at first glance.
Garage door opener sendor.
If an object or person is in the way of the beam the closing door reverses direction.
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They ensure that your garage door stops closing or opening when it recognizes that there s something in it s way.
If they re turned on in both the sensors then there is no issue with the power supply.
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Depending on the model of sensor the lights may indicate whether the glass eyes of the sensors are obscured.
The garage door opener has two sensors that prevent the garage door from closing on a person or object.
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Garage door opener sensors are also called photoelectric safety sensors.
If you find the lights turned off in one or both the sensors it indicates that there is a problem in power supply.
One that sends an infrared beam and one that receives the beam.
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Look for small led lights on the sensors.
This includes any dirt or other debris that is on the lens.