Ensure The Safety Reversing Sensors Are Aligned; Ensure The Door Control Is Wired Correctly; If The Amber Led On The Sending Sensor Is Not Glowing; If The Green Led On The Receiving Sensor Is Not Glowing - Chamberlain 8164W User Manual

If the receiving sensor is in direct sunlight,
switch it with sending sensor so it is on the
opposite side of the door.
(invisible light beam)
Green LED
Amber LED
SENDING SENSOR RECEIVING SENSOR
1
2
1
2
Push
Button
883LMW
3