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Danfoss Icon2 in Home Assistant

Thermostats & TRV · Zigbee · Icon2 Main Controller, Room Thermostat or Sensor

Zigbee2MQTT Quirk proposed, not merged yet

Zigbee device – see the note above on what ZHA needs for it.

Brand: Danfoss
Model: Icon2
Device type: Thermostats & TRV
Radio: Zigbee
Power: Battery
Reports itself as: Danfoss
Zigbee2MQTT: Device page on zigbee2mqtt.io

How the device gets into Home Assistant

official ZHA – with a Zigbee coordinator and the ZHA integration; for all its functions it needs a custom quirk, see above. Integration
add-on Zigbee2MQTT – Zigbee2MQTT runs as an add-on and passes the device on to Home Assistant over MQTT. Integration · Source

Known problems and fixes

Changes proposed for ZHA

pull request A quirk is proposed to allow the Danfoss Icon2 main controller to work with Home Assistant, enabling proper integration and control features that are not supported today. since October 31, 2026 · zha-device-handlers #5646
pull request The Danfoss Icon2 thermostat is not supported in ZHA. Adding a quirk would allow Home Assistant to read and set temperature values. since May 6, 2026 · zha-device-handlers #4976

ZHA quirks for this device

Quirk proposed, not merged yet Recommended quirk

Proposed to ZHA and waiting for review – the maintainers check it before it becomes part of Home Assistant.

Adds: Room status Floor sensor mode Schedule Pre-heat Pump running System status Water flow mode Controller role Forced heating/cooling mode

Source: zha-device-handlers · pull request #4976 · by @ps-nl · May 6, 2026
Signature: Danfoss / 0x0210

The quirk is not part of ZHA yet. You can use it as a custom quirk until it is:

Tell ZHA where custom quirks are kept – in configuration.yaml:
```
zha:
  custom_quirks_path: /config/custom_zha_quirks/
```
Create that folder and save the quirk as a .py file in it.
Restart Home Assistant. If the device was paired before, reconfigure it or remove and pair it again so the quirk is applied.
Check it worked: the device page shows the quirk under Zigbee info.

A custom quirk has not been reviewed by the ZHA maintainers. Delete the file once the quirk is part of a Home Assistant release – otherwise the old copy takes precedence.

All quirks in the ZHA quirk database →

Alternatives

The same job from other makers – devices of the same type and radio that work with Home Assistant too.

Aqara SRTS-A01 Thermostats & TRV · Zigbee · Smart radiator thermostat E1 Zigbee2MQTT ZHA quirk 1 open report Review · from 180.48 €
Zen Zen-01-W Thermostats & TRV · Zigbee · Thermostat Zigbee2MQTT ZHA quirk 1 open report Review
Alecto SMART-HEAT10 Thermostats & TRV · Zigbee · Radiator valve with thermostat Zigbee2MQTT ZHA quirk Review · from 98.13 €
Brennenstuhl HT CZ 01 Thermostats & TRV · Zigbee · Radiator thermostat Zigbee2MQTT ZHA quirk Review