LiftMaster 41A4373A replacement infrared safety sensor beams kit for LiftMaster, Chamberlain and Sears Craftsman garage door openers.
The LiftMaster 41A4373A are the replacement safety sensor beam infrared photo eye sensors that have a green indicator light on both of the sensors used on many garage door openers manufactured between 1993 to 1997. These garage door openers typically had a green learn button on the back of the garage door opener that is used to program the remotes with. The 41A4373A are the replacement sensor heads only and have a 12” wire extending from them but they DO NOT include the mounting brackets. These LiftMaster 41A4373A safety sensors are a genuine factory original part made by Chamberlain Corporation who makes the LiftMaster, Sears Craftsman, Master Mechanic, Access Master, Do-It and some of the Wayne Dalton garage door openers. A good sign that the safety sensor beams are bad, provided that they are aligned, is when you can open the garage door opener normally but not close it unless you hold down the wall button until the door is fully closed. The older model 41A4373 used a plug in connector and these have been replaced with the 41A4373A. To use these replacement beams with the old model, just cut off the connector and then attach the two wires using the supplied connectors. The LiftMaster 41A4373 replacement safety beam kit includes one sending head, one receiving head, four easy connect connectors and instructions.
These beams have a green LED indicator on both sides.
NOTE: If your beams have a green indicator on one side and a yellow indicator on the other side you need the LiftMaster part number 41A5034 available in our store.
NOTE: The model number of the garage door opener will typically be under the light cover.
Sears Craftsman Models all start with 139. then the number listed below:
53225, 53325, 53425, 53479, 53491, 53525, 536141, 536151, 536181, 536191, 536251, 53626, 536261, 53627, 536271, 53628, 53629, 53635, 53635, 53636, 53637, 53640, 53641, 53645, 53646, 53648, 53650, 53660, 53669, 53678, 536759, 53800, 53824, 53834, 53859, 53915, 53927, 53960, 53970, 53971, 53973. (Not all models listed).
Dimensions: 3 1/8” long, 2 ¾” tall, 2 3/8” deep (including dome on back side)
If you are not positive that this is the correct item for you, please email us. We are more that happy to assist you in determining the correct item for you. If you need to contact us for assistance please have the Make and Model number of the garage door opener, radio receiver or transmitter. We would rather have you contact us than end up with the wrong item and have to return it.