How do I change or reset the WiFi connection on my RTH8500WF WiFi Series WiFi Touchscreen Programmable Thermostat?

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Wi-Fi Reset:

A basic Wi-Fi reset can be completed by removing the thermostat face plate from the wall plate for 30 seconds and then reattaching it. The thermostat will then attempt to reconnect to the previously configured Wi-Fi network. To connect to a new Wi-Fi network:

TH8320WF / RTH8580WF – Proceed to step 1 to “forget” the current Wi-Fi configuration and connect to a new network. If your thermostat is already registered to your account, step 2 and step 3 are not required.

TH8321WF – On the thermostat screen, select Menu – WiFi setup. Press the down arrow until “Disconnect Wi-Fi network?” is displayed and select Yes.

Connecting your thermostat to Wi-Fi can be performed during the initial setup and configuration, or later at a time you choose.

Connecting to Wi-Fi – Initial Setup:

After the Configuration step during the initial install, you will be prompted to connect your VisionPRO Wi-Fi 8000 to your Home Wi-Fi.

The VisionPRO Wi-Fi 8000 (TH8321WF) can be connected to Wi-Fi on the thermostat itself after initial setup / configuration, or from the Menu > Wi-Fi Setup screen. After successful connection, register your product on the website to complete the process and control the thermostat remotely.

The VisionPRO Wi-Fi 8000 (RTH8580WF / TH8320WF) uses a 3-step connection and registration process

Step 1 – Connect your mobile device to the thermostat’s Wi-Fi network (NewThermostatxxxxxx)

Step 2 – Connect the thermostat to your home Wi-Fi (via an internet browser on your mobile device)

Step 3 – Register with Honeywell / resideo. (Performed in the My Total Connect Comfort web portal)

*Registration cannot be performed with the mobile app, currently only supported via the web portal*

Step 1 – Connecting your mobile device to the thermostat’s Wi-Fi network (NewThermostatxxxxxx)

Once installed and configured, the (TH8320WF / RTH8580WF) thermostat will display “Wi-Fi Setup”. Open the Settings – Wi-Fi on your mobile device and connect to the Wi-Fi network named “NewThermostatxxxxxx”.

*If your thermostat does not display Wi-Fi Setup remove the thermostat faceplate from the wall plate for 30 seconds and then reattach it. If Wi-Fi setup does not display, enter the Installer Setup (press the System button, then hold the center blank box at the bottom of the thermostat display for 5-10 seconds until the screen changes) and use the User / Installation Guide to navigate the settings to function 0890 . Make sure function 0890 is set to 1, then proceed to function 0900. Use the up or down arrow to change function 0900 function to 0 then press done. WiFi setup will then be displayed on the screen. Return to step 1.*

**TH8321WF – After initial configuration, you will be prompted to connect to WiFi. Select your Home Wi-Fi network, then enter the password on your thermostat screen**

Step 2 – Connect the thermostat to your home Wi-Fi (via an internet browser on your mobile device)

Skip this step for the TH8321WF.

TH8320WF / RTH8580WF - After connecting to the thermostat Wi-Fi, open a web browser (Safari, Chrome, etc.) You should be automatically guided to a page labeled “Thermostat Wi-Fi Setup. If you are not automatically guided there, enter the IP address: into the address bar on your browser to navigate there manually.

You should see your Home Wi-Fi network listed. Select it and enter your Wi-Fi password. After a brief connection period, your thermostat will display a “Connection Success” message. Reconnect your phone to your home wi-Fi network if your device does not reconnect automatically

*If you do not see your home Wi-Fi network, refresh the list. If your Wi-Fi network is still not displayed, check the Trouble Connecting? / Wi-Fi network recommendations below.*

Step 3 – Register at

Registration is completed at Navigate to the page and create an account / login.

Select the “Add Device” icon and Input the MAC ID / CRC for your device. (MAC ID / CRC are located on your thermostat information card, on the back of the thermostat, or from the Menu > Equipment Status screen])

Complete the security check (if prompted) and follow the directions within the web portal to complete the registration.


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