LiftMaster / Accessory reference

LiftMaster 312HM

LiftMaster 312HM: 315 MHz coaxial receiver: high-security mode supports up to 15 Security+ remotes.

US source scopeUpdated 2026-09-12Independent Anderson reference

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Manufacturer identifier: 312HM. Keep every character when comparing it with your label or paperwork. A similar number does not establish the same component.

Denco supplier reference: RC 312HMh1; span.sku; Description two bullets: high-security versus normal-security capacities · checked 2026-09-12 · Denco

Values apply to the exact identifier and scope in the cited source.
Supplier-stated detail	315 MHz coaxial receiver: high-security mode supports up to 15 Security+ remotes. Denco supplier reference: RC 312HMh1; span.sku; Description two bullets: high-security versus normal-security capacities · checked 2026-09-12 · Denco
Supplier-stated detail	Normal-security mode separately supports up to 31 remotes described broadly as any type at 315 MHz. Denco supplier reference: RC 312HMh1; span.sku; Description two bullets: high-security versus normal-security capacities · checked 2026-09-12 · Denco
Selection limitation	These are alternative mode capacities, not a combined capacity of 46. Exact remote models, receiver power and relay ratings are not supplied. Denco supplier reference: RC 312HMh1; span.sku; Description two bullets: high-security versus normal-security capacities · checked 2026-09-12 · Denco

Documented fitment & exclusions

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Equipment or component / relationship	Evidence and conditions
86LM Documented compatibility From 86LM to 312HM.	Denco names 86LM in the stated application with 312HM. The kit includes an antenna bracket and 15 ft cable. Cable length is not a radio-range claim. Applies only within this source scope Market: US connection-purpose: Remote antenna mounting using the 86LM kit. Denco supplier statement for the US reference catalog; confirm the installed equipment and required functions. This is not a physical fitment test. The kit includes an antenna bracket and 15 ft cable. Cable length is not a radio-range claim. Denco supplier reference: RC 86LMh1; span.sku; Description two bullets: four exact referenced models and kit contents · checked 2026-09-12 · Denco

Direct replacement paths

No direct successor for 312HM is verified in this reference.

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

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Selected: 312HM · Read its reference. Selection identifies a record; it does not confirm fitment.

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Sources & scope

Denco supplier reference: RC 312HMDenco · US · checked 2026-09-12
Denco supplier reference: RC 86LMDenco · 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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