Aqara Radiator Thermostat W600: Matter over Thread and Zigbee TRV

Aqara Radiator Thermostat W600: Matter over Thread and Zigbee TRV

The Aqara Radiator Thermostat W600 (models WT-A03E and WT-A03D) is a battery-powered smart radiator valve that connects via Matter over Thread, and it also supports Zigbee mode through the Aqara Home app. Aqara says it works with Apple Home, Google Home, Amazon Alexa, Home Assistant, and SmartThings in Thread mode. It is CSA-certified as a Matter thermostat, so MatterCheck's type-level matrix shows pairing, control and automation action as Yes on all seven platforms, with automation trigger Unknown on Apple Home and Amazon Alexa and Yes on the other five.

Matter transport, Thread role, and CSA certification

The W600 is a Thread End Device (MTD), meaning it does not relay messages for other Thread devices and relies on nearby Thread routers to save battery. It needs a Thread border router plus a Matter controller from your platform; MatterDevices.io notes that devices like a HomePod mini, Google Nest Hub (2nd gen), or Amazon Echo (4th gen) can handle both roles. The device also has Bluetooth for commissioning and auxiliary functions.

CSA records list two certificates for this model. The earlier certificate, CSA25234MAT45446-24, was certified on 30 April 2025. The newer certificate, CSA263YCMAT54532-24, was certified on 7 July 2026 with firmware 1.1.1.2 and hardware version 1.0.0.0. The CSA product page for Smart Thermostat W600 shows Matter specification version 1.3 and Thread and Bluetooth transport, certified as the Matter thermostat device type. The DCL model record uses vendor ID 0x115F (Aqara) and product ID 0x4805, with part number AA014. Note that the DCL also lists part number AA014 for the Aqara Thermostat Hub W200, so the part number alone is not unique to the W600.

Platform support matrix for Matter thermostats

These are MatterCheck's type-level matrix answers for the thermostat device type, not product-specific test results for the W600. See MatterCheck's thermostat type page for the full type-level breakdown.

For Apple Home and Amazon Alexa, the matrix shows automation trigger support as Unknown for thermostats. That means MatterCheck has no official source or dated hands-on report confirming whether a Matter thermostat can start automations on those platforms; it does not mean the W600 cannot. Aqara's product page lists Apple Home, Google Home, Amazon Alexa, Home Assistant, and SmartThings as compatible Matter platforms, and MatterDevices.io says the W600 works with those platforms as long as they support thermostat and TRV devices. Homey and Hubitat are not named in the W600 sources, but the type-level matrix shows Yes for pairing, control, automation trigger, and automation action on both.

Cross-platform comparison from the matrix and sources

Across the seven platforms, the W600's Matter thermostat type has full Yes values for pairing and control everywhere. The only Unknown cells are automation trigger on Apple Home and Amazon Alexa. Google Home, SmartThings, Home Assistant, Homey, and Hubitat all show Yes for both automation directions. In practice, The Ambient's July 2026 review reported occasional Matter over Thread quirks in Apple Home, where the W600 sometimes showed as heating when no heat was being delivered; removing and reinserting the batteries fixed it. Trusted Reviews' February 2026 review noted that changes made outside the Aqara app do not always sync back into the Aqara app, which can make the true state of the device harder to see. For more on how Matter devices behave across platforms, see MatterCheck's guide to Matter thermostat support and how multi-admin sharing works.

Setup, specs, and reported behaviour

The W600 ships in Thread mode by default. To add it in Thread mode, open your smart home app, choose to add a device, and scan the Matter QR code under the outer shell or on the packaging; you can also enter the 11-digit Matter code manually. You need a Matter controller and a Thread border router. Aqara's M3 hub or M200 hub can act as the Thread border router if you add the W600 through the Aqara app. Switching to Zigbee mode takes about five minutes and requires a factory reset: double-tap the top button, then hold it for ten seconds. The same process switches back to Thread. Only one protocol is active at a time.

Key specs and limits from Aqara and retailer listings:

• Dimensions: ⌀57 × 90 mm; weight about 269 g per unit.
• Power: 3 V from two 1.5 V AA alkaline batteries; Aqara estimates up to 2 years of battery life based on 8 months of typical use.
• Threaded connection: M30 × 1.5 mm, with six adapters included: RA, RAV, RAVL, Caleffi, Giacomini, and M28 × 1.5.
• Temperature control in 0.5 °C increments, with calibration of ±5 °C on the built-in sensor.
• Operating temperature 0 °C to 40 °C; operating humidity 0–95% RH, non-condensing; IP20.
• Noise level below 30 dB, according to Aqara.
• 180° rotatable LED display.
• No Wi-Fi, no Ethernet, no Z-Wave. Bluetooth is for pairing only.
• No direct boiler control. The W600 controls the radiator valve, not the boiler itself.

Zigbee mode via the Aqara Home app unlocks features that are not available in Matter mode. Aqara's product page footnotes local schedules, external temperature sensor linking, use of the Aqara Climate Sensor W100 as a room thermostat, multi-device group control and frost protection as requiring Zigbee mode; the reviews additionally describe open-window detection and child lock as part of the Zigbee feature set. In Matter over Thread mode, the W600 still works locally without internet for basic control, but advanced Aqara features and firmware updates may require the Aqara app.

Trusted Reviews' Paul Lamkin installed the W600 in under five minutes, praised the metal mounting hardware, and found the top button's press combinations unintuitive. He reported that window detection worked well, noise was similar to a Tado TRV, and scheduling allowed up to seven time periods per day. The Ambient's Paul Lamkin review, published 27 July 2026, tested mostly in Zigbee mode with an Aqara M3 hub and reported excellent reliability with no dropouts. In Thread mode with Eero border routers, performance was generally good apart from the Apple Home heating-state quirk. Both reviews note that the W600 is not a whole-home heating system and has no boiler link.

Aqara Radiator Thermostat W600 verdict

• Buy if you already use Aqara Zigbee devices and want the full feature set: external sensor linking, open-window detection, frost protection, child lock, and local schedules.
• Buy if you want a Matter over Thread TRV at a lower price than the Eve Thermo, with direct pairing to Apple Home, Google Home, Alexa, SmartThings, or Home Assistant.
• Skip if you need boiler control or whole-home heating coordination; the W600 only controls the radiator valve and cannot start the boiler on its own.
• Skip if you want a simple button interface. Reviewers found the top button's press-and-hold combinations confusing and often had to check the manual.
• Skip if you expect third-party platform changes to sync back into the Aqara app reliably; both reviews reported sync inconsistencies.