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Garage door laser sensor and sunlight.
If they re turned on in both the sensors then there is no issue with the power supply.
Sunlight can interfere with the sensors beam and cause them to act as if an object blocks them.
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If you find the lights turned off in one or both the sensors it indicates that there is a problem in power supply.
A common cause of a malfunctioning garage door sensor is lack of power supply.
Garage door sensors use infrared light.
Nowadays for safety reasons most garage doors have them.
The sun also carries infrared light which is more powerful than the light of the sensors.
If you are in a hurry and need to get your garage door closed right away stand in such a way that you cast a shadow over your garage door s beam sensor but of course don t block the beam itself just the sunlight that is shining on it and then press your remote control so that your door will close.
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So the answer to the question is yes.
Whenever there is an obstruction the garage door will automatically reverse before causing any damage.
Automated garage door systems explains why this happens.
Proper height for a garage door sensor is 4 to 6 inches 10 2 to 15 2 cm.
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The sensors only work when the door is in the process of closing.
If you have a laser level you can use it instead of a string to align your garage door.
The replacement safety sensors project an invisible light beam across the inside of the garage door to prevent accidents and are required for safe use of all chamberlain garage door openers.
Look for small led lights on the sensors.
Many years ago sensors weren t common.