LiftMaster 373LM 5-Pack 3-Button Security+ 315 MHz Remote Control
The LiftMaster 373LM is a three-button visor remote control built for compatible Security+ 315 MHz garage door opener and receiver systems. This multipack is useful when several vehicles or users need matching remote controls for the same purple learn button opener system, or when replacing several older 315 MHz remotes at one time. The 373LM is a rolling-code remote, not a fixed DIP switch transmitter, so it must be programmed through the learn button on the opener or receiver.
This remote is commonly used in residential and light commercial garage door applications where the opener has a purple learn button and Security+ 315 MHz radio technology. The three-button layout allows one remote to control multiple compatible openers or receiver channels. Compatibility is based on radio technology and learn button color, not just the LiftMaster name on the cover.
Compatible With
Common Compatible Products and Systems
- Select LiftMaster garage door openers with a purple learn button
- Select Chamberlain garage door openers with a purple learn button
- Select Sears Craftsman garage door openers with a purple learn button
- Select Raynor garage door openers using Security+ 315 MHz radio technology
- Select AccessMaster and Master Mechanic openers made by Chamberlain with purple learn button radio systems
- Compatible 315 MHz Security+ receivers and operator radio controls when programmed to the receiver
- Commonly associated with openers using 370LM, 371LM, 372LM, 373LM, 377LM, 315 MHz Security+ accessory families
Important Compatibility Notes
- Not compatible with red/orange 390 MHz Security+ systems
- Not compatible with yellow Security+ 2.0 systems
- Not compatible with green billion-code systems
- Not compatible with older 390 MHz fixed-code DIP switch systems such as 61LM applications
- Verify the opener or receiver uses a purple learn button before programming
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | 3-button visor remote control multipack |
| Part Number | 373LM |
| Pack Quantity | 5 remotes |
| Frequency | 315 MHz |
| Security Technology | Security+ rolling code |
| Learn Button Color | Purple |
| Button Count | 3 buttons per remote |
| Application | Compatible LiftMaster, Chamberlain, Craftsman, Raynor, AccessMaster, and related 315 MHz Security+ opener systems |
| Notes | Program each remote to the compatible opener or receiver learn button. |
Also Known As / Related Part Numbers
- 373LM
- G373LM
- 373LMMC
- 370LM
- 371LM
- 372LM
- 377LM
- 315 MHz Security+ remote
- Purple learn button remote
- LiftMaster 3-button 315 remote
- Chamberlain 953D related family
- Craftsman 139.53753 related 315 MHz family
- Raynor 373RGD related family
Technician Note
For remote controls, the learn button color is the fastest field check. A 373LM remote should be matched to purple learn button Security+ 315 MHz equipment. If the opener has a red/orange, green, or yellow learn button, this is the wrong remote family. If the old remote has physical DIP switches, use a DIP switch replacement instead of the 373LM.
Before Ordering, Confirm
- The opener or receiver has a purple learn button
- The existing remote family is 315 MHz Security+
- The customer needs three-button operation
- The opener memory has room for additional remotes
- The system is not Security+ 2.0, 390 MHz Security+, or fixed-code DIP switch
Professional Advisory
After programming, test each button from a safe location with the garage door or gate in full view. Do not use a remote to operate an unsafe door, damaged gate, failed safety system, or opener with unreliable travel or reversing behavior.
Questions & Answers
What learn button color does the 373LM use?
The LiftMaster 373LM is for compatible Security+ 315 MHz systems with a purple learn button.
How many openers can one 373LM remote control?
One 373LM remote has three buttons and can control up to three compatible garage door openers, gate operators, or receiver channels when each device supports the 315 MHz Security+ remote family.
Is the 373LM the same as a 971LM or 893LM?
No. The 373LM is a 315 MHz Security+ purple learn button remote. The 971LM is a 390 MHz red/orange learn button remote, and the 893LM is a Security+ 2.0 yellow learn button remote.
Can this 5-pack be programmed to the same opener?
Yes. Multiple 373LM remotes can usually be programmed to the same compatible opener or receiver, subject to the memory capacity of the operator or receiver.
What should be checked before replacing an older remote with 373LM?
Check the original remote model, learn button color, radio frequency, and whether the opener uses Security+ 315 MHz rolling-code technology.
