Picture of the touchscreen of the Honeywell RTH8580WF Wifi Thermostat, showing SUCCESS messsage after having properly logged into the new wireless network.

Honeywell Thermostat WiFi Setup RTH8580WF

Why would you need to perform Honeywell thermostat WiFi setup for the RTH8580WF internet thermostat?  Well, you may need to connect your Honeywell RTH8580WF Wifi Thermostat to a different wireless network. Or, perhaps you have changed the name of your home wifi network.  Or, maybe you want to connect to a different WiFi access point in your home. For all these cases, you can do them by following the procedure below.





Honeywell Thermostat WiFi Setup Overview

This WiFi thermostat, during initial setup, actually becomes a wireless access point.  Plus, it has its own web site that you can connect to.  Use a mobile device or laptop to administer the thermostat via this site. Note however, that Ethernet-based devices cannot be used for this part of setup. Specifically, you must use a wifi-capable computer device.

Now we assume that your thermostat is up and running.  We also assume that it is connected to a particular WiFi network.  Then,  all you need is to change its current wireless network name and password. All other non network-related settings need no changes.

Picture of the Honeywell RTH8580 Wireless Thermostat, Installed and Operating.
Honeywell RTH8580WF WiFi Thermostat, Installed and Operating

The picture above shows the thermostat, already connected to an in-range WiFi network.

Enter Honeywell Thermostat WiFi Setup Mode

Switch from normal to WiFi setup by changing operating parameter 900 from a 1 to a 0. This forces disconnection from the current WiFi network, and starts Wi-Fi Setup. Do this as follows:

Press the System Button

See the screen change to the following:

Picture of the screen display of the Honeywell RTH8580WF thermostat, in System mode.
Screen Display of the Honeywell RTH8580WF thermostat, in System mode.




Press and Hold the Blank Square Button to Continue with Honeywell Thermostat WiFi Setup

Find this button in the middle (above pic), on the bottom of the screen, until the screen changes to the following. You may have to keep pressing for up to five seconds.

Picture of the Honeywell RTH8580WF Thermostat on the Parameters Configuration Screen.
Honeywell RTH8580WF Thermostat on the Parameters Configuration Screen

Press the Center UP and DOWN Arrow Keys

Pressing these keys advances through the parameters list. Stop when you find code 900. The touchscreen should then appear as follows:

Picture of the parameter 900 (Wi-Fi Connection) selected.
Parameter Code 900 (WiFi Connection) selected on the Honeywell RTH8580WF thermostat.

Set Value of Parameter Number 900 to Zero

Using the value Up / Down arrow keys (far right above), change the value of parameter 900 from 1 to 0, as pictured next. This forces WiFi disengagement.

Picture of the touchscreen, showing WiFi connection status set to OFF (0).
WiFi connection status set to OFF (0).

Press the DONE Button to Continue with Honeywell Thermostat WiFi Setup

Find DONE in the lower left corner of the screen. This applies the new setting, and deactivates the current WiFi connection. You should then see a status message across the top of the screen indicating this. Wi-Fi Disconnected, as follows:

Picture of the screen of the Honeywell RTH8580WF thermostat, showing this device in the Wi-Fi Disconnected state.
Wi-Fi Disconnected state on the Screen Display of the Honeywell RTH8580WF Thermostat

The above message displays for several seconds, and then, the thermostat goes into the Wi-Fi Setup mode, as pictured next.

Picture of the Screen Display of the Honeywell RTH8580WF Thermostat, in Wi-Fi Setup Mode
Screen Display of the Honeywell RTH8580WF Thermostat, in Wi-Fi Setup Mode

You’re Finished with Honeywell Thermostat WiFi Setup Part 1 !

You have now accomplished putting the thermostat into WiFi Setup Mode. So proceed to the next step.





Next, Find the Thermostat WiFi Network on your Mobile Device

In WiFi Setup Mode, the RTH8580WF creates its own little wifi network. In this step, you will connect your tablet or other wifi computer device to this network, where you’ll then be guided through selecting the desired new Wifi network, to which you’d like to connect this thermostat. We used an iPad Air tablet to connect, by going to Settings->Wifi. The screen we saw on the tablet follows.

Screen shot from iPad Air, showing the Honeywell RTH8580WF Thermostat Created Wifi Network, circled in blue.
Honeywell RTH8580WF Thermostat Created Wifi Network, circled in blue.

Connect to the Thermostat Wifi Network

Next, use the procedures supported by your computer / tablet / phone to connect to this network. Here, the WiFi network is called NewThermostat 277279. This is an open wireless network, so you need no password. But have no security fears though.  Why? Because this thermostat-generated network disappears once you finish Wi-Fi Setup.

Once you connect, your device should automatically display the following network selection page. This is the list of available wifi connections to your thermostat.

Picture of the Available Networks screen generated by the RTH8580WF WiFi thermostat.
Available Networks Screen generated by the RTH8580WF WiFi thermostat.

Select the Desired Network

On the above screen, pick the desired network.  Tap the area above it or click it with the mouse. In our case, we’re choosing the 937T681J4059H SSID to connect with. The system then prompts for the password of that network, as pictured next.

Picture of the RTH8580WF Honeywell thermostat, prompting for the network key on an iPad Air.
Prompting for Network Password, Honeywell Wifi Thermostat RTH8580WF.

Enter the New Network’s Key / Password

Upon entry of the correct network password, the RTH8580WF turns off its own WiFi network. This was the  “NewThermostat 277279” network.





It then connects to the WiFi network you’ve set. After that, the network selection window on your tablet / computer should go away in a couple seconds.  Next, a “Connecting…” message appears as follows:

Honeywell RTH8580WF Displaying Connecting... Message as it attempts to log into the chosen Wifi network.
Honeywell RTH8580WF Displaying Connecting… Message as it attempts to log into the chosen WiFi network.

It can take up to thirty seconds for the new connection to form, so be patient.

At any rate, once it does, another message displays in the touchscreen status area, that alternates between “Connection successful,” and “Joined network” as follows:

Picture of the touchscreen of the Honeywell RTH8580WF Wifi Thermostat, showing SUCCESS messsage after having properly logged into the new wireless network.
The Honeywell RTH8580WF Wifi Thermostat, successfully connecting to a new wireless network, and displaying a SUCCESS message.

 

Picture of the touchscreen status area, displaying the "Joined Network" status message on the Honeywell RTH8580WF Wifi Thermostat, indicating the name of the WiFi network just joined.
Joined Network Status Message on the Honeywell RTH8580WF WiFi Thermostat, indicating the name of the WiFi network just joined.

Thermostat Then Exits WiFi Setup Mode

Next, wait one to three minutes.  Then, if no errors connecting to the Internet happened, the RTH8580WF exits WiFi Setup mode. It then returns to normal operation mode as displayed below. Furthermore, the text disappears from the blue-encircled space illustrated in the above picture. Then, the WiFi signal strength meter appears. See this meter in the picture below. If you see this, then you’ve done everything right. The thermostat is now communicating through the Internet with the Honeywell smart thermostat management servers. Congratulations! You’ve successfully changed / updated the thermostat’s network settings.

Picture of the Honeywell RTH8580WF Wifi Thermostat, Returned to Normal Operation after successful configuration of a new wireless network, showing the circled wifi status icon in the status area.
Honeywell RTH8580WF Wifi Thermostat, Returned to Normal Operation after successful configuration of a new wireless network.

Check the documentation that came with your thermostat.  Look for what to do next. You’ll now be able to access and control your thermostat remotely, via the web. See our Honeywell Programmable WiFi Thermostat Review for more details.

Suggested Reading

  1. How to Reconnect Honeywell Thermostat to WiFi
  2. Factory Default Reset Honeywell WiFi Thermostat RTH8580WF
  3. How to Change Honeywell Thermostat Temperature Setting
  4. Alexa Echo Subwoofer Setup Instructions for Amazon Echo Sub Speaker
  5. How to Register Honeywell WiFi Thermostat RTH9580WF Online
  6. Setting Temperature Differential on Honeywell WiFi Thermostat RTH8580WF
  7. How to Connect Honeywell Thermostat to Google Home
  8. 7 Day Programmable Thermostat Reviews
  9. How to Turn Off Hold on Honeywell Thermostat
  10. Honeywell Dial Thermostat Pictures
  11. Echo Dot 3 Setup Instructions for Amazon Alexa 3rd Generation Dot
  12. Solving Honeywell WiFi Thermostat Connection Problems
  13. How to Clear Settings on Honeywell Thermostat
  14. Honeywell WiFi Thermostat RTH8580WF Manual
  15. How to Restart Honeywell Thermostat
  16. Echo Spot WiFi Setup Instructions
  17. How to Clear Schedule on Honeywell Thermostat
  18. Honeywell Touchscreen Thermostat RTH7600D Review




References for Honeywell Thermostat WiFi Setup

  1. RTH8580WF Wireless Thermostat Product Page
  2. Where to buy the Honeywell RTH8580WF Programmable Thermostat

Revision History

  • 2018-12-12: Originally published.
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