LiftMaster / Accessory reference

LiftMaster L993M

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

US source scopeUpdated 2026-09-15Independent Anderson reference

Match the whole number.

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. View source and citation details 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. View source and citation details 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. Denco’s listing does not supply exact operator models, numeric frequencies, radio range or battery-status functionality. The model pairings below have separate GAS Hardware sources and conditions. View source and citation details 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

Read the exact equipment or component, market, production and variant limits in every row. An omitted pairing has not been verified by this reference.

Source statements and their exact conditions. Use the checker below to compare equipment or a component.
Equipment or component / relationship	Evidence and conditions
4690L Documented compatibility From L993M to 4690L.	Conditional Additional source conditions or an adapter must be checked before confirming compatibility. Details still needed production date source conditions Use the exact label and the source scope below. An unanswered condition keeps this result conditional or unverified. GAS Hardware lists L993M for 4690L, subject to the stated source conditions and installed-equipment check. Applies only within this source scope Market: US Production on or after: 1998-01-01 GAS Hardware names this exact opener for L993M; confirm the installed model and required remote functions. This is a supplier application statement, not a physical pairing test. No reverse or family-wide compatibility is inferred. The myQ setup footnote separately requires a yellow learn button; this edge does not establish every app feature. The source also limits its general compatibility statement to post-1997 openers with safety sensors. GAS Hardware source: L993MDescription: explicit Basic/Premium/Plus Series application list: 4690L · checked 2026-09-13 · GAS Hardware
6580L Documented compatibility From L993M to 6580L.	Conditional Additional source conditions or an adapter must be checked before confirming compatibility. Details still needed production date source conditions Use the exact label and the source scope below. An unanswered condition keeps this result conditional or unverified. GAS Hardware lists L993M for 6580L, subject to the stated source conditions and installed-equipment check. Applies only within this source scope Market: US Production on or after: 1998-01-01 GAS Hardware names this exact opener for L993M; confirm the installed model and required remote functions. This is a supplier application statement, not a physical pairing test. No reverse or family-wide compatibility is inferred. The myQ setup footnote separately requires a yellow learn button; this edge does not establish every app feature. The source also limits its general compatibility statement to post-1997 openers with safety sensors. GAS Hardware source: L993MDescription: explicit Basic/Premium/Plus Series application list: 6580L · checked 2026-09-13 · GAS Hardware
6690L Documented compatibility From L993M to 6690L.	Conditional Additional source conditions or an adapter must be checked before confirming compatibility. Details still needed production date source conditions Use the exact label and the source scope below. An unanswered condition keeps this result conditional or unverified. GAS Hardware lists L993M for 6690L, subject to the stated source conditions and installed-equipment check. Applies only within this source scope Market: US Production on or after: 1998-01-01 GAS Hardware names this exact opener for L993M; confirm the installed model and required remote functions. This is a supplier application statement, not a physical pairing test. No reverse or family-wide compatibility is inferred. The myQ setup footnote separately requires a yellow learn button; this edge does not establish every app feature. The source also limits its general compatibility statement to post-1997 openers with safety sensors. GAS Hardware source: L993MDescription: explicit Basic/Premium/Plus Series application list: 6690L · checked 2026-09-13 · GAS Hardware

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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Selected: L993M · Read its reference. Selection identifies a record; it does not confirm fitment.

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Recall references

No recall reference is included for this identifier in the published dataset. This is not a safety clearance or proof that no recall exists.

Sources & scope

Denco supplier reference: RC L993MDenco · US · checked 2026-09-12
Denco supplier reference: RC 371LM*Denco · US · checked 2026-09-12
GAS Hardware source: L993MGAS Hardware · US · checked 2026-09-13

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.

Related equipment guides

LiftMaster 4690L: chain-drive package and rail-option labels

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This is an independent Anderson reference. Manufacturer names identify the equipment and do not imply affiliation or authorized-dealer status.

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