|Item Weight||2.4 ounces|
|Package Dimensions||6.2 x 4.3 x 2.6 inches|
|Item model number||41A4373|
|Item Package Quantity||2|
|Number Of Pieces||2|
Chamberlain Liftmaster 41A4373A Safety Sensors
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- Enter your model number to make sure this fits.
- For garage door openers that currently have sensors installed
- 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
- Includes 1-sending unit, 1-receiving unit, Wire connectors, and instructions - no brackets
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The 41A4373A Sensors are Replacement Safety Sensors (infrared eye) for 1993-late 1990's operators with the Safety Sensor option. Billion code series with the Green LED light***Not compatible with sensors that have Red LED lights ***If your sensors have a green light on one sensor and an orange light on the the other, you need the 41a5034 sensors.****
Top customer reviews
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. One is 470uf at 16 volts. The other is 1uf at 50 volts. The cold increases conductivity and reduces the resistance of the insulation material in the capacitor. Age of the insulation material also degrades. This in turn impacts the completion of the circuit being created by the electronic sensor eyes at the garage door opener itself. (yes, too much info here but I wracked my brains out trying to figure out the WHY instead of just replacing the sensors)
The replacement sensors are a perfect fit and are identical in all dimensions to the OEM Craftsman sensors. We were able to use existing hardware, including the sensor mounting brackets and even the wing nut and bolt. Installation merely required removing the wing nut to take the old sensors off each bracket. One hint - don't remove the adapter-plug that slides onto the old sensor. All you have to do is strip about 1/4" of the new sensor's wire and insert it into the plug; Wrap with electrical tape to hold in place. Replace the wing nut/bolt and you're back in business!
To install, cut the wires from the old sensors and remove from their mount. Save the mounting bolts as none are included with the safety beam sensor kit. Splice the wires and connect to the new sensors using the supplied crimp connectors. Align the sensors using the alignment indicator lights. Then throw away the old sensors.
For me purchasing this lit and spending about 15 minutes in the garage is well worth the savings. If you are a do-it-yourselfer, perhaps this kit is for you too.
Simple to install
They work like the originals
Mounting bolts not included
You get the sender and receiver eyes with about 3 feet of wire on each one.They include what I call Scotch locks to connect to the existing wire and seal the connection. Just insert the wire and use pliers to crimp the two together. The Scotch locks have a gel that seals the connection.
These worked great, the eye sensors are easy to line up. You get a green light on each sensor when they are aligned correctly.
The do not come with mounting bolts or wing nuts so make sure and save the ones you are replacing. If you using these on an old opener you might want to check the chain tension while your working on the opener.
Jamie @ R3
Most recent customer reviews
I have an older Liftmaster and the new ones wouldn't work.