GSTB-R STB-BL Safety Sensors, Replacement for genie/overhead garage door sensors, Compatible for genie/overhead Garage Door openers Made After 1993
1) they must be placed on the opposite side of the door opening,
2) at the right height,
3) clear line of sight between them. (Max Range 30 feet)
You need to replace your Safety Sensor when you encounter the following situations:
1.There are no obstacles, but the garage door stops reversing.
2.The green light is on but the yellow light is off please replace the sensor.
3.In cold weather and strong ultraviolet rays, the garage door stops reversing.
Don't worry this is not a huge deal and following the below 3 steps I am confident we can find your issue and get it fixed.
Trouble shooting Steps:
Step 1) Adjustment, Cleaning, and Checking for Signal
Step 2) Checking the Wiring
Step 3) Checking if the Sensors are Bad