How To Align Garage Door Sensor Lights. Once you have finished doing this, you should see a beam. This is the first thing you should check when your garage door won't close.
Cut about 2 inches from the end of the roll and tape it to the sensor with duct tape to restore sensor operation. Green lights mean the sensors are working, while red lights indicate the sensors are not aligned. Install bifold doors new construction garage door sensor yellow light.
This is the first thing you should check when your garage door won't close.
Give your garage door opener a try. If you check the garage door, you will find that both sides of the garage door have sensors. Verify the wire connections are correct on the garage door opener. Then rotate it back into position and make sure both are level.