Whole-home climate control from one screen.

The Aqara Thermostat W400 is a wall-mounted smart thermostat with a 4-inch touchscreen, built to run VRF and FCU climate systems. It replaces the basic wall controller on your air conditioning with a panel that also drives the rest of your smart home — lighting, window coverings and scenes — so one point on the wall does the work of several.

Finished in grey, with a glass front panel over a flame-retardant ABS body.

Features:

• Built for VRF and FCU Systems: Designed specifically for variable refrigerant flow and fan coil unit installations — the W400 (WT-A01D) is the VRF model.
• Matter Certified: Certified to the Matter smart home standard, so it works across major platforms and stays compatible as your setup grows.
• 4-Inch Touchscreen: A clear, responsive display that anyone in the house can use without instructions.
• Triple Wireless: Wi-Fi (2.4GHz / 5GHz), Zigbee and Bluetooth on board. No hub is needed for Wi-Fi operation, though an Aqara hub is recommended if you are adding Zigbee sub-devices.
• Zigbee Network Repeater: Acts as a repeater to extend and strengthen your Zigbee mesh as you add devices.
• More Than a Thermostat: Control connected lights and curtains, and trigger scene automations directly from the panel.
• Fully Customisable Interface: Six configurable pages and ten styling options, so the screen shows what your household actually uses.
• Mains Powered: Runs on 220–250V AC, 50/60Hz — wired in during installation, no batteries to change.

Specifications:

Model: WT-A01D (VRF). FCU variant: WT-A02D

Colour: Grey

Display: 4-inch touchscreen

Wireless Protocols: Wi-Fi 2.4GHz / 5GHz, Zigbee, Bluetooth

Certification: Matter

Power Supply: 220–250V AC, 50/60Hz

Dimensions: 86 × 86 × 44 mm

Weight: approx. 180 g

Materials: Flame-retardant ABS with glass panel

Operating Temperature: 10°C ~ 40°C

Operating Humidity: 0 ~ 95% RH, no condensation

What is in the Box: Thermostat W400 × 1, Mounting hardware, User Manual × 1