Strip 7/16-inch of insulation from each solid-white and white-with-black-stripe wire on both sensors. Twist together the two white-with-black-stripe wires from both sensors. Twist together the two solid-white wires from both sensors. Connect the two white-with-black-stripe wires to screw terminal 3 on the motor unit.

The reason why the new devices cannot be added to an old opener is that the electronic eye and sensing device must be part of a new circuitry that monitors whether they are working properly.

Light indicators: An easy way to tell if your garage door sensors are out of alignment is by checking if the exterior LED light blinks when you attempt to close the door. Green lights mean the sensors are working, while red lights indicate the sensors are not aligned.

Install the sensor brackets on either side of your garage door no higher than 6″ above the floor. See your owner’s manual for the type of installation needed for your garage door. Mount the receiver sensor on the side of the garage door where it is not be affected by the sun, 4-6″ above the floor.

Some of the most common are Liftmaster, Chamberlain, and Genie. And they all have these photo eyes. And because of this, there are several different styles of safety sensors. But no matter what they look like, or how they are wired, they all work pretty much the same.

41A4373A Sensors are compatible with LiftMaster and Chamberlain Brand from 1993 – late 1990’s Each sensor has a green light and a bolt that runs right through the center of each sensor Designed to splice into your existing wires

The 41A4373A Sensors are Replacement Safety Sensors (infrared eye) for 1993-late 1990’s operators with the Safety Sensor option.

LiftMaster, Chamberlain 801CB part number, Sears Craftsman, Raynor compatible garage door opener replacement safety sensors. These garage door opener replacement safety sensors help make sure your garage remains safe.

After researching the problem (spring tension, up/down force setting, alignment of sensors) it was finally determined that the sensors themselves had become defective. This is due to the cold weather affecting the capacitor in the sensor. Each sensor has a capacitor on its printed circuit board. Each circuit board has two electrolytic capacitors.