LiftMaster / Accessory reference

LiftMaster L993M

LiftMaster L993M: Controls up to three LiftMaster garage, gate or commercial-door operators manufactured after 1997.

US source scopeUpdated 2026-09-12Independent Anderson reference

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Manufacturer identifier: L993M. Keep every character when comparing it with your label or paperwork. A similar number does not establish the same component.

Denco supplier reference: RC L993Mh1; span.sku; Description bullets: brand/date/three-operator scope, auto detection and myQ generation scope · checked 2026-09-12 · Denco

Values apply to the exact identifier and scope in the cited source.
Supplier-stated detail	Controls up to three LiftMaster garage, gate or commercial-door operators manufactured after 1997. Denco supplier reference: RC L993Mh1; span.sku; Description bullets: brand/date/three-operator scope, auto detection and myQ generation scope · checked 2026-09-12 · Denco
Supplier-stated detail	Automatic frequency detection is listed; myQ app programming, naming, notifications and access history are scoped to Security+ 3.0 and Security+ 2.0 garage-door openers. Denco supplier reference: RC L993Mh1; span.sku; Description bullets: brand/date/three-operator scope, auto detection and myQ generation scope · checked 2026-09-12 · Denco
Selection limitation	The app scope is narrower than the general operator scope. Exact operator models, numeric frequencies, radio range and battery-status functionality are not supplied. Denco supplier reference: RC L993Mh1; span.sku; Description bullets: brand/date/three-operator scope, auto detection and myQ generation scope · checked 2026-09-12 · Denco

Documented fitment & exclusions

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No equipment or component pairing is verified in this published reference. Match the exact equipment with LiftMaster official support before selecting a component.

Direct replacement paths

No direct successor for L993M is verified in this reference.

Earlier numbers this item is listed to replace

L993M replaces 371LM only within the following source scope.
Denco names L993M as a replacement for 371LM. The cited successor description limits myQ app features to Security+ 3.0 and Security+ 2.0 garage-door openers. No exact installed model is identified.
Applies only within this source scope
- Market: US
- replacement-purpose: Replacement of the exact named remote or keypad; installed receiver and required functions must be checked.
- replacement-scope: LiftMaster garage, gate or commercial operators manufactured after 1997; up to three operators.
- Denco supplier statement for the US reference catalog; confirm the installed equipment and required functions. This is not a physical fitment test.
- The cited successor description limits myQ app features to Security+ 3.0 and Security+ 2.0 garage-door openers. No exact installed model is identified.
- Denco supplier reference: RC 371LM*h1; span.sku; Description discontinuation/replacement bullet and protocol/frequency bullets · checked 2026-09-12 · Denco
- Denco supplier reference: RC L993Mh1; span.sku; Description bullets: brand/date/three-operator scope, auto detection and myQ generation scope · checked 2026-09-12 · Denco

A direct replacement statement does not establish reverse interchangeability, a kit equivalent or a later replacement chain.

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Recall references

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Sources & scope

Denco supplier reference: RC L993MDenco · US · checked 2026-09-12
Denco supplier reference: RC 371LM*Denco · US · checked 2026-09-12

Anderson prepared this reference from the listed evidence. Source statements are not an Anderson installation inspection or independent product test. Official documents stay on their publisher’s website.

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