Skip to content
Home Assistant TestFlight
Zehnder

Zehnder ComfoConnect LAN C firmware R1.5.x

Thermostats · Climate

Not working

1 report: 1 says it doesn’t work.

Reported with 1 integration: Zehnder ComfoAir Q.

What people report

IntegrationIn Home AssistantIn Apple HomeWhat they saidSource
Zehnder ComfoAir QNot workingKeyError 25; entities not created on gateway firmware R1.5.x
Saved copy
The problem ## Problem The official Home Assistant `comfoconnect` integration fails to connect to a Zehnder ComfoAir Q when using a ComfoConnect LAN C gateway with firmware R1.5.x. Entities are not created and Home Assistant logs show repeated connection errors. ## Environment - Home Assistant OS 16.3 - Home Assistant Core 2025.12.3 - Integration: comfoconnect (official) - Gateway: Zehnder ComfoConnect LAN C - Gateway firmware: R1.5.1 - Device: Zehnder ComfoAir Q350 - Connection method: LAN C (local IP, no PRO, no Modbus) ## Configuration [code] yaml [code] txt Exception: Not connected! …

Excerpt saved from GitHub on 2026-10-23.

Issue #158972 · 2025-12

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

BrandZehnder
ModelLAN C
CategoryThermostats