W600 does not use external temperature sensor W100 for control

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Hi,
I’m experiencing an issue with the Aqara Thermostatic Radiator Valve W600 when paired with an external temperature sensor W100.

My setup:
Aqara Thermostat Valve W600 (fw: 2442)
Aqara Temperature Sensor W100
Devices are correctly paired and associated
Platform: Aqara app, no third-party automations involved

Problem description:
The W100 sensor is correctly associated with the W600, its temperature is visible and updates correctly in the Aqara app.
However, the W600 valve continues to display and use its own internal temperature sensor, and the heating behavior (valve opening/closing) clearly follows the internal temperature instead of the external W100 sensor.

Has anyone managed to make the W600 actively control heating based on an external sensor?
I’ve already tried resetting and re-pairing the devices and checked all available settings.

Any clarification from Aqara staff or feedback from other users would be greatly appreciated.

Thanks!

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Hello, welcome to the forum. This firmware has its own specifics, since the W600 uses the PID control method, the temperature directly on the W600 gives me the opportunity to compensate the thermostat relative to the W100 sensor located in another part of the room. I visually see how much I need to compensate the W600 relative to the W100. Unfortunately, I think this feature will be removed in future firmware.

The W100 works in tandem with the W600, although you can see the temperature of the radiator.

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Thanks for the explanation, but I’m a bit confused because it doesn’t match Aqara’s website or the app behavior.
In the Aqara app, when the W100 is associated, it explicitly states that the valve will be regulated based on the external sensor temperature.
Additionally, the official Aqara product page says: “The radiator will automatically adjust based on these accurate readings, not just around the radiator.”
This clearly implies that the external sensor should be used as the control/reference temperature, not just for visual comparison or manual compensation.

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I think this is a temporary phenomenon of this firmware, it gives you a unique opportunity to see the dependence of the temperature near the radiator on the temperature of the W100. I assume that this will be fixed in the next version of the firmware. Maybe they will make a function of selecting the temperature information of the white W600 with the attached W100.

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