The working of these sensors is quite simple.
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The garage door sensors are the safety add on to your garage doors.
Once your garage door is secure pull down on the manual release cord which should be red and located next to the garage door motor.
A common cause of a malfunctioning garage door sensor is lack of power supply.
To disable your garage door sensor first make sure your garage door is closed or propped up with 2 by 4s just in case it comes crashing down when it s put into manual mode.
Raise the garage door using the control button on the garage wall or the remote control unit from a vehicle.
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These sensors are designed to ensure that nothing is in the way of the door at the bottom of the opening.
First check the sensor lights.
Depending on the brand.
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Look for small led lights on the sensors.
It prevents the doors from automatically closing when anyone is in the doorway.
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.
If you find the lights turned off in one or both the sensors it indicates that there is a problem in power supply.
The most common problem with garage door openers is safety sensor misalignment.
Inspect each sensor to make sure the green or red power indicator lights are.
Because of their location they are often bumped or moved or covered with dust dirt or leaves in the garage.
If they re turned on in both the sensors then there is no issue with the power supply.
They only have an effect on the closing of the door so if your door opens but does not close it might be the garage door sensors.