LiftMaster 373LM 3-Button Security+ 315 MHz Remote Control
The LiftMaster 373LM is a three-button remote control for compatible 315 MHz Security+ systems. It is commonly used with purple learn button LiftMaster, Chamberlain, Craftsman, and related openers or receivers.
This remote is useful when one transmitter needs to operate multiple compatible garage doors, gate receivers, or accessory channels on the same Security+ 315 MHz radio family.
Compatibility and Application
The 373LM is for compatible purple learn button Security+ 315 MHz applications. Each button can be programmed separately to a supported opener or receiver channel.
Do not use the 373LM for yellow Security+ 2.0, red/orange 390 MHz Security+, green Billion Code, or DIP-switch systems. For those radio families, a different remote or receiver setup is needed.
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | 3-button remote control |
| Part Number | 373LM |
| Application | Multiple compatible garage door openers, gate receivers, or accessory channels |
| Compatible Operator Type | Security+ 315 MHz LiftMaster-style systems |
| Security Technology | Security+ 315 MHz |
| Learn Button Color | Purple |
| Number of Buttons | 3 |
| Notes | Three-button version of the older 315 MHz Security+ remote family |
Also Known As / Related Part Numbers
- 373LM
- 373LMC / G373LM references
- Related 315 MHz Security+ family: 370LM, 371LM, 372LM
- Commonly cross-referenced with Raynor 373RGD and select Chamberlain/Craftsman 315 MHz Security+ remote families
Technician Note
For customers with one purple-button opener, the 371LM is often enough. The 373LM makes more sense when there are two or three compatible devices to control from one remote.
Before Ordering
- Confirm a purple learn button or compatible 315 MHz Security+ receiver.
- Use only with supported 315 MHz Security+ systems.
- Program each button separately to its device or channel.
- Choose a MAX or learning remote only if older and newer LiftMaster radio families must be combined.
- Do not program or test the remote unless the door or gate area is clear.
Professional Advisory
A remote control is only one part of the access system. If an opener has unsafe travel, missing photo eyes, damaged wiring, or intermittent operation, the equipment should be inspected before new remotes are added.
Product Questions & Answers
What is the difference between 371LM and 373LM?
The 371LM has one button, while the 373LM has three buttons for controlling up to three compatible 315 MHz Security+ devices or channels.
What learn button color does the 373LM use?
The 373LM is used with compatible purple learn button Security+ 315 MHz systems.
Can the 373LM operate three garage doors?
Yes, when all three openers or receiver channels are compatible 315 MHz Security+ systems and each button is programmed separately.
Will the 373LM work with a yellow learn button opener?
No. Yellow learn button systems use Security+ 2.0 and require a compatible Security+ 2.0 or MAX/learning remote.
Why is the range poor after programming?
Weak batteries, damaged antenna wire, electrical interference, or a failing receiver/control board can reduce remote range.
