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Home Assistant TestFlight
Stiebel Eltron

Stiebel Eltron THZ 504

Thermostats · Climate

WorksLocal

1 report: 1 says it works.

Reported with 1 integration: Stiebel Eltron ISG.

What people report

IntegrationIn Home AssistantIn Apple HomeWhat they saidSource
Stiebel Eltron ISGWorks LocalSame 2026.7.1 failure reported; closed as fixed
Saved copy
Similar issue with my THZ 504 and ISG connect - tried to rollback to last working version (2026.2) but did not work. Deleted the whole HACS ISG module and re-installed 2026.2 still did not work.

Excerpt saved from GitHub on 2026-10-23.

Issue #601 · 2026-07

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

BrandStiebel Eltron
ModelTHZ 504
CategoryThermostats