What You Will Need

Aqara Thermostat Hub W200
Aqara Home app (iOS or Android)
2.4 GHz WiFi network
Screwdriver (Phillips head)
Wire labels or masking tape and a pen (for labeling existing wires)
Compatible HVAC system (supports most 24V systems with C-wire)

Step 1: Check HVAC Compatibility

The Aqara Thermostat Hub W200 works with most standard 24V HVAC systems, including forced air, heat pumps, and radiant heating. It requires a C-wire (common wire) for power. Before removing your existing thermostat, open its cover and verify you have at least the following wires: R (power), W (heat), Y (cooling), G (fan), and C (common). If you do not have a C-wire, you may need to run one or use an add-a-wire adapter kit. Consult an HVAC technician if you are unsure about your wiring.

Step 2: Turn Off HVAC Power

Go to your home's electrical panel or furnace and switch off the breaker that powers your HVAC system. This is a critical safety step. Confirm the system is off by checking that your existing thermostat display is blank or unresponsive.

Step 3: Remove Your Old Thermostat

Remove the faceplate from your existing thermostat.
Take a photo of the wiring for reference before disconnecting anything.
Label each wire with its terminal letter (R, W, Y, G, C, etc.) using tape or wire labels.
Disconnect each wire from its terminal.
Remove the old mounting plate from the wall. Fill any mismatched screw holes with spackle if needed.

Step 4: Mount the W200 Base Plate

Hold the Aqara W200 base plate against the wall and use a level to ensure it is straight.
Thread the labeled wires through the opening in the base plate.
Mark the screw hole locations with a pencil.
Drill pilot holes if mounting on drywall, and insert the included wall anchors.
Secure the base plate to the wall with the included screws.

Step 5: Connect the Wires

Connect each labeled wire to its matching terminal on the W200 base plate. The terminals are clearly marked (R, C, W, Y, G, and others depending on your system).
Push each wire firmly into the terminal connector until it clicks. Give each wire a gentle tug to confirm it is secure.
If you have a heat pump, connect the O/B wire to the designated terminal.
Double-check all connections against your reference photo.

Step 6: Attach the Thermostat and Power On

Snap the W200 display unit onto the base plate. It connects magnetically and should seat flush against the wall.
Go back to your electrical panel and restore power to the HVAC system.
The thermostat screen will light up and begin the initial setup process.

Step 7: Set Up in Aqara Home

Open the Aqara Home app and tap the + icon to add a new device.
Select Thermostat Hub W200 from the device list.
Follow the on-screen instructions to connect the thermostat to your 2.4 GHz WiFi network.
The app will guide you through configuring your HVAC system type (conventional, heat pump, etc.) and setting your preferred temperature units.
Set your initial heating and cooling set points.

Step 8: Configure Schedules and the Zigbee Hub

The W200 includes a built-in Zigbee 3.0 hub, so it can serve as the central hub for your Aqara Zigbee accessories. Pair temperature sensors in other rooms to enable multi-room climate monitoring. Set up weekly heating and cooling schedules in the app to save energy. The thermostat also supports Apple Home, Google Home, and Amazon Alexa for voice control — link your Aqara account in the respective platform to get started.

Tips

Place Aqara Temperature and Humidity Sensors in frequently used rooms and create automations to balance temperatures throughout your home.
Enable the W200's built-in occupancy sensing or pair it with an Aqara Presence Sensor for automatic away-mode adjustments.
If your HVAC system does not respond correctly after installation, verify that the system type is configured correctly in the app settings.
Update the firmware through the Aqara Home app after installation for the latest features.

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