41a4373A Liftmaster Sensors

41A4373A Liftmaster Garage Door Opener Safety Sensors

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Part Number: 41A4373A

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41A4373A Liftmaster Garage Door Safety Sensors (pair) (old style)

The Liftmaster 41A4373A Sensors were used on Liftmaster, Chamberlain, Sears, and Craftsman garage door openers from 1993 to 1997. The safety sensors are required for the garage door to close properly. If the sensors are misaligned or malfunctioning then the operator will not close the garage door. The set includes the Sending Eye and the Receiving Eye, pigtail wires coming out of the sensors so they can be spliced to existing safety sensor wires and splice connectors.

To determine if these are the correct sensors for your operator, there will be a hole in the center of the sensors where the bolt goes to attach the sensors to the sensor brackets (not included). Compatible with various Liftmaster residential and the commercial ATS model operators.

Features

Liftmaster Garage Door Opener Safety Sensors
Part no.: 41A4373A (041A4373ATS)
Includes both the Sender and Receiver Sensors
The 41A4373A Sensors are the old style of sensors and are distinguished by a hole in the center of the sensor where a bolt goes through to attach to the mounting bracket.
Compatible with Liftmaster (Sears/Craftsman/Chamberlain) openers manufactured from 1993 to 1997

Mounting brackets are NOT included but can be purchased with the sensors as an option (41A6569 Sensor Mounting Brackets)

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Average Customer Ratings

5.0

Much improved

Just replaced some 20+ year old sensors that were getting very finicky. These were easy to install, easy to align, and a big improvement.

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Reviewed by: Chris Bitner from Longmont on 7/7/2025

Q: How to tell which one is the sender ot the receiver. And tell if it's is good or bad

Asked by: GARY BURCHWELL - 12/12/2024

A: Each sensor should have a Green indicator light that is glowing solid. This indicates that the sensors are aligned and receiving power. If you put your hand in front of the sensor and the Green indicator light goes out then that is the receiving sensor. The sending sensor will glow solid regardless if the lens is blocked or misaligned.

Was this answer helpful? 1 of 1 Customer(s) found this Answer helpful.

Answer provided by: Brian (12/12/2024)

Q: Will this lift master safety sensor work for my chamberlain model 4600 installed in 1996? Serial number 34461A00323

Asked by: Oakley - 2/14/2025

A: Yes, these are the same sensors as the original sensors included with the operator.

Was this answer helpful? 0 of 0 Customer(s) found this Answer helpful.

Answer provided by: Brian (2/14/2025)

Q: Are there batteries within the garage door sensors and how are they changed

Asked by: Edward Scoca - 1/13/2026

A: There are no batteries in the safety sensors. They are hardwired to the garage door operator.

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Answer provided by: Brian (1/14/2026)

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41A6569 Liftmaster Safety Sensor Mounting Brackets

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