There are several reasons why your thermostat cannot “see” the Wi-Fi home network. First, verify the following:
1. Your router is powered and broadcasting. You can check this on your mobile device by accessing an Internet
browser. If you are not sure if you are using your mobile data or your Wi-Fi connection, put the mobile device in
Airplane Mode, then switch on the Wi-Fi signal. If you can browse the Internet in this mode, this means that you
have an active Wi-Fi Connection.
2. Check that your router is broadcasting the Wi-Fi signal in the 2.4GHz range. This step is required for the
following reason: most routers broadcast the signal on a dual frequency, 2.4 GHz and 5 GHz and most of the
more recent smartphones and tablets can “see” both these frequencies. However, Honeywell Home thermostats
only operate in the 2.4GHz range. Check your router manual to see how you can make sure it’s broadcasting on
a 2.4 GHz range.
Please note that if you live in an area with many Wi-Fi networks broadcasting in the same space, it’s possible that
your thermostat did not find your network on the first scan. You will need to refresh the network list by pressing the
“Refresh” button on your Honeywell Home app screen and try connecting again.
Also, if you have chosen to use a non-broadcasting SSID (network name) on your router, your network name will not
appear on the Honeywell Home Wi-Fi list. You will need to manually add your router using the “+” button at the
bottom of your Lyric app screen.
If the steps above don’t provide a solution, you can try and reset your thermostat. You can reset your credentials just
for your Wi-Fi connection, HomeKit, or Program Schedule, or you can bring your thermostat back to its factory
settings.
Please follow the instructions below to reset your thermostat:
Please see the User Guide for Lyric T5 Wi-Fi Thermostat for more detailed information on how to troubleshoot your
Wi-Fi connection.
Please see the user guide for Honeywell Home T6 Pro for more detailed information on how to troubleshoot your
Wi-Fi connection.
Why can’t I register my T5, T5+, or T6 Pro WiFi to my account?
Registration occurs during the initial pairing with the Honeywell Home app. If you receive an error message stating
that the thermostat is already registered, you can contact the previous owner of the thermostat and ask that they
delete the thermostat from their account, or contact Resideo Customer Care to unregister the device. (Please have
the model number and MAC ID [inscribed on the back of the thermostat faceplate] to expedite the process.)
*If you receive a different error during the connection / registration process, please see the When setting up my T5 /
T5+, why can’t I connect to my Wi-Fi? Support article for more information.
When setting up my T5 / T5+, why can’t I connect to my Wi-Fi?
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