Honeywell Thermostat Not Working Since Fiber Internet Installed

What you're experiencing sounds like more than just a network connection issue.

However, assuming it is only a network connection issue, you may find that the Thermostat doesn't like the Gateway's band steering, where both 2.4 GHz and 5 GHz bands have a common SSID allowing devices to shift between.  You can avoid this particular issue by either using the Guest Network SSID (which is always 2.4 GHz only) or by giving the two bands different SSIDs (under Advanced Settings on the Gateway's Wi-Fi page) and using the 2.4 GHz SSID when setting up the Thermostat.

Thanks, JefferMC, I will give those things a try. It certainly could be a major coincidence that it all happened at the same time. Thanks again!

yep i had to do this with all my ring and other cameras

Hey @mjdudas, we understand that you're having trouble with your thermostat not working correctly with your new internet install. We're here to help.

As the Ace stated that could be due to the device trying to connect to the wrong band. We recommend that you try what the Ace suggested.

• Enhanced home Wi-Fi networking- This will help with information on how band steering works.

Please let us know if that works for you.

Charles, AT&T Community Specialist

And I'm here to help by confirming that what ATTHelp Charles said about doing what @JefferMC and @Constructive said is what you should do.  🙄

Thank you, @tonydi , for your contribution to this thread.

"Thank you, @tonydi , for your valuable contribution to this thread"

There, fixed it for you.