Honeywell RTH9580WF Wi-Fi thermostat, displaying a Notification screen, showing that a registration is needed, with the -Wi-Fi Setup- button highlighted.

Reconnecting Honeywell Thermostat RTH9580WF

You might need to reconnect your Honeywell RTH9580WF smart thermostat (t-stat) to the internet, by changing a new WiFi network. Perhaps you moved the t-stat, and the WiFi it worked with before went out of range. So in this post, we cover reconnecting Honeywell Thermostat RTH9580WF to WiFi network, and offer how-to, step-by-step instructions to get your thermostat working on the internet again.





Perhaps you have changed the name of your home wifi network. Or perhaps you changed your WiFi network router and didn’t set your new router’s network parameters exactly the same as were the ones on the old router set. Or, you may want to connect the t-stat to a new access point in your home. For all of these situations, you can reconnect the thermostat to WiFi by following the instructions below.

Change WiFi network on Honeywell thermostat RTH9580WF. Picture of the Honeywell RTH9580WF smart t-stat, front view after initial setup.
Honeywell RTH9580WF smart t-stat, front view, after initial setup.

Reconnecting Honeywell Thermostat RTH9580WF to WiFi Network, How To Instructions

For sure, Honeywell really improved the WiFi setup routine for this smart t-stat. Indeed, you no longer must reconnect to it via a tablet or phone to update the WiFi network settings. But instead, you can now set up the entire WiFi configuration via the RTH9580WF touchscreen menu system. Here’s how to do it.

1. Enter Wifi Setup mode

First of all, switch from normal to Wifi setup as follows. Press the Menu button at the top right of the Home screen, as shown above.

Then, scroll with the arrow keys at right, through the main menu. Stop scrolling when you see the Wi-Fi Setup button, as shown next.

Picture of the t-stat menu, with the -Wi-Fi Setup- button circled.
The t-stat menu, with the -Wi-Fi Setup- button circled.

Next, press the Wi-Fi Setup button, circled in red in the above pic. The WiFi setup screen then displays, as shown next. Note that we have blanked the t-stat MAC address and CRC values, to preserve its anonymity. Also note that normally, this screen shows the status of the connected WiFi network. However here, the OurHouse1 network is not in range (no signal). So we’re going to discard the OurHouse1 information, and replace it with an in-range WiFi network in the following steps.

Picture of the -Wi-Fi Setup- screen. Reconnecting Honeywell Thermostat RTH9580WF.
The -Wi-Fi Setup- screen.

2. Disconnect the T-stat from its Current WiFi Network

Then press the Disconnect from Network button. The WiFi Network Disconnect Confirmation screen appears, as follows.

Picture of the -WiFi Network Disconnect Confirmation- prompt screen.
The -WiFi Network Disconnect Confirmation- prompt screen.

Press the green Yes button. After a pause, the system lets you know that it disconnected from the old WiFi network, as shown next.

Picture of the -Network Disconnected- screen.
The -Network Disconnected- screen.

Then, press the green OK button in the lower right corner of the screen. After the press, this takes you back to the main menu, as shown next.

3. Find the WiFi Setup Button

From there then, use the UP and DOWN arrow keys to scroll through the menu to the Wi-Fi Setup button.

Picture of the -Menu- page, with the -Wi-Fi Setup- button circled. Reconnecting Honeywell Thermostat RTH9580WF.
The -Wi-Fi Setup- button circled on the -Menu- page.

4. Tap the Wi-Fi Setup Button to Continue with Reconnecting Honeywell Thermostat RTH9580WF

Then, press the red-circled Wi-Fi Setup button. When no network information resides in the t-stat, pressing Wi-Fi Setup initiates a scan for in-range WiFi networks. Then, a brief message displays, indicating that the network scan is in progress. Then, the RTH9580WF lists the in-range WiFi networks it found, on its Select Wi-Fi Network screen, as follows:

Picture of the -Select Wi-Fi Network- screen.
The -Select Wi-Fi Network- screen.

5. Find your Desired WiFi Network

Then, tap the network in the list to which you wish to connect the smart t-stat. So in our case, we’re connecting to the 937T681J4059H_2G wireless network. The WiFi Password Entry screen then appears, as follows.

Picture of the Honeywell RTH9580WF smart t-stat , showing the WiFi Network Password Entry screen.
Honeywell RTH9580WF smart t-stat , showing the WiFi Network Password Entry screen.

6. Enter WiFi Password if Asked For

Next, use the displayed virtual keyboard to enter your password. Then, to enter numbers and punctuation characters, press the ?123 key. Why? Because this switches the keyboard to number entry mode.





The password characters appear as you type them. So do this when no non-trusted folks are looking.

7. Connect to the WiFi Network you Picked to Continue with Reconnecting Honeywell Thermostat RTH9580WF

When you’ve finished entering the password characters, press the green Done button. This WiFi t-stat then tries to connect to the selected WiFi network. While reconnecting, it displays the following screen while it does so.

Picture of the -Connecting to WiFi Network- screen.
The -Connecting to WiFi Network- screen.

Then, if no errors happen, the system reconnects to the selected WiFi network. Then it displays the following screen. It shows the name of the wireless network that the t-stat now connects with.

Picture of the -Connection Successful- screen. Reconnecting Honeywell Thermostat RTH9580WF.
The -Connection Successful- screen.

8. Register your Honeywell Thermostat Online for Remote Access

Next, press the green OK button. Then, the Register Online for Remote Access screen then displays, as shown next. Now perhaps you already registered your WiFi t-stat. If so, then you need not register it again, so long as you have not unregistered it. Note that reconnecting to a new WiFi network does not unregister the t-stat.

Picture of the -Register Online for Remote Access- screen.
The -Register Online for Remote Access- screen.

Then, press the green Done button. The system then returns to the Wi-Fi Setup screen. But this time, the connected network information appears, as shown in the next shot.

Picture of the thermostat displaying the -Wi-Fi Setup- screen, showing that the network connected successfully.
The thermostat displaying the -Wi-Fi Setup- screen, showing that the network connected successfully.

Next, press the green Done button. Then, the t-stat takes you back to the main menu, as shown below.

Picture of the t-stat -Menu- page, with the -Wi-Fi Setup- button circled.
The t-stat -Menu- page, showing the -Wi-Fi Setup- button circled.

Then from there, press the Home button at the top left corner of the Main Menu screen, to return to the Home screen, as shown next.

Picture of the Honeywell RTH9580WF smart t-stat, front view after initial setup. Reconnecting Honeywell Thermostat RTH9580WF.
Honeywell RTH9580WF smart t-stat, front view after initial setup.

9. Done with Reconnecting Honeywell Thermostat RTH9580WF !

Finally, your Honeywell smart thermostat now links to your new WiFi network. You’ll see that when the outdoor temperature and humidity settings update soon thereafter.  So, you’ve successfully reconnected your Honeywell RTH9580WF wireless thermostat to your new or updated WiFi network.





Other Posts About the Honeywell RTH9580WF Thermostat

  1. Honeywell RTH9580WF WiFi Setup Instructions
  2. Change WiFi Network on Honeywell Smart Thermostat RTH9580WF
  3. How to Change Honeywell Thermostat Temperature Setting
  4. Change Time and Day on Honeywell RTH9580WF Thermostat, How To
  5. Connecting Amazon Echo Dot to Honeywell Thermostats
  6. How to Reset Honeywell Thermostat RTH9580WF
  7. Fixing WiFi Problems on Honeywell RTH9580WF Smart Thermostat
  8. How to Find Honeywell RTH9580WF Thermostat IP Address, MAC ID, CRC
  9. Honeywell Smart Thermostat Wiring Instructions RTH9580WF
  10. How to Set Honeywell RTH9580WF Thermostat Temperature
  11. Register Honeywell WiFi Thermostat RTH9580WF Online
  12. Unregister Honeywell Thermostat RTH9580WF Instructions
  13. How to Calibrate Honeywell Thermostat Temperature RTH9580WF
  14. Honeywell Smart WiFi Thermostat Manual RTH9580WF
  15. Restore Factory Defaults, Honeywell Smart Thermostat RTH9580WF
  16. Setting Temperature Differential, Honeywell Smart Thermostat RTH9580WF
  17. Honeywell RTH9580WF Thermostat Reset Instructions
  18. How to Lock Unlock Honeywell Thermostat RTH9580WF
  19. Honeywell Waiting for Update RTH9580WF Message
  20. Set Honeywell Thermostat Temperature Limits on RTH9580WF
  21. Honeywell Thermostat Waiting for Equipment Message, How to Clear on the RTH9580WF Smart Thermostat
  22. Honeywell RTH9580WF Smart Thermostat Review

Related Posts to Reconnecting Honeywell Thermostat RTH9580WF to WiFi

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References for Reconnecting Honeywell Thermostat RTH9580WF

  1. Where to buy the Honeywell RTH9580WF Smart Thermostat
  2. RTH9580WF Wireless Thermostat Product Page

Revision History

  • 2020-04-18: Added more tags.
  • 2018-07-27: First published.
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