LiftMaster 971LM 390 MHz Security+ Remote for 139.536670SRT1

LiftMaster 971LM 390 MHz Security+ Remote for 139.536670SRT1

The LiftMaster 971LM is a one-button 390 MHz Security+ remote control for compatible residential garage door openers and radio receivers. This listing is written for 139.536670SRT1 and related Sears Craftsman, Chamberlain, LiftMaster, and Raynor openers that use red/orange learn button Security+ technology. The remote sends a rolling-code signal to the opener, which helps prevent code grabbing and makes it different from older fixed-code DIP switch remotes.

The 971LM is typically used when replacing a lost, broken, or worn single-button remote on a compatible 390 MHz Security+ opener. It is best matched by learn button color and receiver technology. A red or orange learn button usually points to the 390 MHz Security+ family, while purple learn buttons use 315 MHz Security+ remotes and yellow learn buttons use Security+ 2.0 remotes. This distinction is important because many Sears Craftsman and LiftMaster remotes look similar but are not interchangeable.

Compatible With

The 971LM is commonly used with compatible 390 MHz Security+ openers and receivers. Compatibility should be based on learn button color, radio frequency, and opener model family.

Common Compatible Products and Systems

• Sears Craftsman 139.536670SRT1
• LiftMaster 971LM-compatible 390 MHz Security+ systems
• Sears Craftsman 139.53667
• Sears Craftsman 139.536670SRT1
• Select Chamberlain 390 MHz Security+ red/orange learn button openers
• Select LiftMaster 390 MHz Security+ red/orange learn button openers
• Select Craftsman 390 MHz Security+ red/orange learn button openers
• Select Raynor 390 MHz Security+ red/orange learn button openers
• Compatible 390 MHz Security+ radio receivers using 971LM-style programming

Important Compatibility Notes

• For Security+ 390 MHz rolling-code systems only.
• Not for older 61LM-style DIP switch receivers.
• Not for purple learn button 315 MHz systems.
• Not for yellow learn button Security+ 2.0 systems.
• If replacing a multi-button remote, confirm that a one-button remote is acceptable for the application.

Features & Specifications

Also Known As / Related Part Numbers

These part numbers and search terms are commonly associated with the 971LM Security+ 390 MHz remote family. Some are related remotes with different button counts and should be matched by application.

• 971LM
• 971LMC
• 971RGD
• Sears Craftsman 139.53667
• Sears Craftsman 139.536670SRT1
• 970LM
• 973LM
• 970LMC
• 973LMC
• LiftMaster Security+ 390 MHz one-button remote
• Red/orange learn button remote
• 390 MHz Security+ remote

Technician Note

The easiest field check is the learn button color. Red or orange usually indicates a compatible 390 MHz Security+ system. If the opener uses external receivers or older Craftsman labeling, open the receiver cover and confirm the model before ordering.

Before Ordering, Confirm

• The opener or receiver uses Security+ 390 MHz technology.
• The learn button is red or orange on compatible equipment.
• The old remote is in the 971LM / 970LM / 973LM Security+ family, or the opener manual lists compatible 390 MHz Security+ remotes.
• The customer only needs one-button control.
• The system is not fixed-code DIP, 315 MHz purple learn button, or Security+ 2.0 yellow learn button.

Professional Advisory

Program the remote with the garage door in view and test the safety reversal system after programming. A remote should not be used to operate a door with damaged sections, broken springs, missing safety sensors, or unsafe travel.

Important Ordering Warnings

• Do not confuse 971LM with 61LM fixed-code remotes.
• Do not use 971LM on purple learn button 315 MHz systems.
• Do not use 971LM on yellow learn button Security+ 2.0 systems.
• Sears Craftsman model numbers can be close; match the learn button and radio technology.

Questions & Answers

Is the 971LM compatible with 139.536670SRT1?

The 971LM is commonly associated with 139.536670SRT1 and related Sears Craftsman 390 MHz Security+ systems using a red or orange learn button.

What learn button color does the 971LM work with?

The 971LM is for compatible Security+ 390 MHz systems, commonly identified by a red or orange learn button on the opener or receiver.

Is the 971LM the same as an older 61LM DIP switch remote?

No. The 971LM is a Security+ rolling-code remote. The 61LM and 390LMD21V style remotes are fixed-code DIP switch transmitters for older receivers.

Can this remote replace a 973LM or 970LM?

The 971LM is a one-button remote in the same 390 MHz Security+ family as related 970LM and 973LM remotes, but button count and programming needs should be checked before replacing one model with another.

Will this work with purple or yellow learn button openers?

No. Purple learn button systems use Security+ 315 MHz remotes, and yellow learn button systems use Security+ 2.0 remotes.