Garage Door Safety Turn On Light Sensor Not Working

Look for small led lights on the sensors.

Garage door safety turn on light sensor not working.

The first is an obstruction in the path of the door and therefore in the path of the sensor. Sometimes the sensor becomes faulty and needs to be replaced. If you do not see a solid illumination or your garage door is not working the problem is most likely due to the sensors being out of line. A common cause of a malfunctioning garage door sensor is lack of power supply.

Raise the garage door using the control button on the garage wall or the remote control unit from a vehicle. For people who do not know the transmitter has the yellow light and the receiving sensor has the green light. The garage door sensor yellow light and the green light together create a solid illumination. All garage door openers use a sensor light to prevent the door from closing when an object is in its path.

According to liftmaster issues with the safety sensor wiring typically occur because of a poor connection incorrectly connected wires or a short in the wire from a staple. The sensors have to be aligned with each other and also have to be connected correctly to the garage door system in order to work. Two types of accidental obstructions can cause the safety sensor to prevent a garage door from closing. Inspect each sensor to make sure the green or red power indicator lights are.

The transmitters remotes will not work to close the garage door. If they re turned on in both the sensors then there is no issue with the power supply. The problem is either due to a blocked path between the sensors dirty eyes loose wires at the sensors or at the motor head or just bad sensors.