The rpm sensor detects the motor speed.
Garage door opener optical sensor.
Open the garage door.
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Place a box or similar object between the safety sensors to block the sensing beam.
This video from sears partsdirect shows how to replace the rpm sensor on a garage door opener.
Lower is easy to stand above with a foot on either side.
Higher than that can miss many low lying objects including pets.
If the garage door opener closes the door with the safety sensors blocked replace the logic board.
Proper height for a garage door sensor is 4 to 6 inches 10 2 to 15 2 cm.
Garage door installation and replacement costs may vary according to style and size.
The door should stay open and the motor unit lights should blink.
Attempt to close the garage door using a remote.
The same process and part can be used for many craftsman and chamberlain belt drive.
This video is on how to change an rpm sensor on a liftmaster chain drive.
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The sensors are located above the.
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Garage door sensors are safety devices that prevent the door from closing on people pets or objects in the doorway.
How to disable a garage door sensor.
Garage door sensors prevent the garage door from closing if there s something in the way.
Sensors are a critical safety feature but can prevent an automatic garage door from working properly.