LiftMaster 373LM / G373LM Three-Button Remote — 315MHz Security+

The LiftMaster 373LM is a three-button remote for compatible 315MHz Security+ rolling-code receivers. Its separate buttons can be enrolled for supported entrances according to each receiver’s instructions, making it useful when one remote needs to serve more than one compatible opening. LiftMaster lists the 312HM receiver among the supported applications. The supplier identifies this offer as G373LM. Confirm every intended receiver before ordering; three buttons do not make the remote universal across different radio generations.

Compatibility — Models, Versions and Exclusions

Identify the Receiver Before Replacing the Remote

The receiver may be built into a garage-door opener or installed as a separate unit on a gate or commercial operator. Read that receiver’s model number rather than relying only on the operator brand. Where a separate receiver has been added, its radio compatibility can differ from the original equipment’s built-in control system.

For an existing remote that has become unreliable, check the specified battery and follow the receiver’s programming instructions before assuming the receiver needs replacement. A weak signal, a damaged remote and a lost enrollment are different problems. If several users need access, also review the receiver’s management procedure so a replacement remote is enrolled without unintentionally removing other authorized transmitters.

Specifications and Product Identification

Before Ordering

• Record each intended receiver’s complete model number.
• Confirm 315MHz Security+ support for every opening to be enrolled.
• Check the supplier’s current legacy-stock offer and package contents.
• Plan button assignments and lost-remote deletion using the receiver instructions.

Package Contents and Separate Requirements

This listing is for the three-button remote. Confirm the current package for a visor clip, battery and instructions. A receiver, garage-door opener, gate operator and wireless keypad are not included. The CR2032 specification describes the replacement battery type; it is not a promise of remaining battery life in a stored legacy product or a guaranteed operating range at a particular property.

Safety Warnings — Read Before Installation or Service

• WARNING: Activate a door or gate only when it is clearly visible, properly adjusted and free of obstructions. Keep people clear until movement is complete.
• Keep remote controls away from children and do not allow children to operate or play with the entrance.
• Coin-cell batteries can cause severe internal injury if swallowed. Keep new and used cells away from children, secure the battery compartment and seek immediate medical attention if ingestion is suspected.
• A remote command does not replace safety sensors or required entrapment protection. Never use programming changes to bypass a safety fault.

Related Products and Important Differences

• 312HM 315MHz receiver — a manufacturer-listed compatible receiver; verify installation and power requirements.
• 893MAX three-button remote — a separately programmed alternative for supported receivers.
• 878MAX wireless keypad — a separate PIN-entry option for supported 315MHz receivers, not included with the remote.

Frequently Asked Questions

Can each button operate a different entrance?

Separate buttons can be enrolled for compatible receivers according to their instructions. Verify each opening independently.

Will it work with every 315MHz receiver?

No. The receiver must support the correct Security+ protocol, not just the same frequency.

What replacement battery does it use?

Manufacturer opener documentation identifies one 3V 2032 lithium coin cell for the 373LM remote.

Can an 893MAX serve as an alternative?

LiftMaster lists 893MAX for supported 315MHz receivers. Verify the exact receiver and required programming mode.

Need Help Confirming the Right Product?

Contact Garage-DoorParts.com before ordering. Send the full equipment model, readable part labels and photographs of the installed assembly. Include the dimensions, electrical configuration or accessory details relevant to your project so the listing can be checked against the actual installation.