Doityourself has a wonderful explanation.
Sun blocker for garage door.
This replacement kit is used to shield sunlight and prevent accidental reversal of garage door from sunlight shinning directly into the safety reversing sensors.
How a garage door sensor works.
Check the manual for your specific model number before ordering to ensure compatibility.
Garage door screens 2 car door 16x7 ft bottom of the screen is weighted self sealing fiberglass mesh magnetic closure for quick entry easy to install.
041b0873 is a safety sensor sun blocker kit.
If your garage door faces south and the door will not go down.
4 3 out of 5 stars 1 066.
Garage door sensor protector black plastic 8 99 4 50 1 count only 12 left in stock order soon.
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.
When the device detects any person or object in the path of a closing garage door it signals the motor to stop the downward action and switch the motion into reverse to stop the obstacle being crushed.
Ships from and sold by 365 garage door parts.
Knowing how a garage door sensor works allows a homeowner to be watchful for what might affect it.