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Home Assistant TestFlight
Lambda

Lambda heat pump firmware 3+ (3K)

Air Conditioners and Heaters · Climate

Partly works

1 report: 1 says it partly works.

Reported with 1 integration: Lambda Heat Pumps.

What people report

IntegrationIn Home AssistantIn Apple HomeWhat they saidSource
Lambda Heat PumpsPartly workshc1 flow line setpoint entity removed on firmware 3+; statistics repairs appear after upgrade
Saved copy
Observations from the same upgrade (2.8.6 → 3.5.6 with the integration firmware option V1.1.0-3K, the pump display shows V1.0.4-3K, see my other report on the register order). These are not bugs in the code, but they cost me time and could be mentioned in the upgrade notes. 1. Setpoint entity: 2.8.6 modelled register 5X07 as `hc1_flow_line_temperature_setpoint` for all firmware. In 3.5 it only exists for firmware levels 1–2; for the V1.1.0-3K option only `hc1_target_temp_flow_line` (read-only) exists. The old entity becomes orphaned, so every dashboard, helper or statistic built on it breaks …

Excerpt saved from GitHub on 2026-10-23.

Issue #134 · 2026-10

Each row is one report from a GitHub thread, an integration’s docs, or r/homeassistant. Check the date and the linked source before you buy.

In ReReHome

Once Home Assistant’s HomeKit Bridge shares it, this device reaches Apple Home as a HomeKit accessory behind your Home Assistant bridge, so ReReHome shows and controls it like any other.

Identifiers

BrandLambda
CategoryAir Conditioners and Heaters