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What do I do if my thermostat is showing a registration error message?

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If your thermostat is showing a registration error message, first determine what message you're receiving.

What message are you receiving?


Failed Registration

1. Are you connected to Wi-Fi?


2. Restart your router.


3. Make sure your router isn't using any advanced security settings.

Advanced security settings include VPNs and network switches with separate firewalls.


4. Is your thermostat still showing a registration error message?

  • YES – Continue to the next step.
  • NO – Congratulations! You've fixed your thermostat's registration error messages! You are now complete.


5. Set up your thermostat on a different wireless network.


6. Is your thermostat still showing a registration error message?

  • YES – Continue to the next step.
  • NO – Congratulations! You've fixed your thermostat's registration error messages! You are now complete.


7. Can you use your phone as a Wi-Fi hotspot?

  • YES – Connect your thermostat to your phone's Wi-Fi hotspot. Continue to the next step.
  • NO – Contact Support at 1-855-733-5465 to find a pro-installer in your area.


8. Is your thermostat still showing a registration error message?

  • YES – Contact Support at 1-855-733-5465 to find a pro-installer in your area.
  • NO – Congratulations! You've fixed your thermostat's registration error messages! You are now complete.


Thermostat-Network Pairing Issues (Same as in Wi-Fi FAQ)

9. Turn off your mobile phone's cellular/mobile data.


10. Turn on your mobile phone's Wi-Fi.

Connect your phone to the same network that you're connecting your thermostat too.


11. Make sure you're using the correct Wi-Fi password.


12. Make sure you're not connecting to a Guest network.


13. Make sure you're connecting to a 2.4 gigahertz (GHz) network.

Honeywell connected thermostats work best with a 2.4 GHz network.


14. Make sure your connecting directly to a router, and not a router accessory.

Examples of router accessories include repeaters and signal boosters.


15. Make sure your router hasn't reached its max number of devices.

Routers typically can only handle a specific number of devices.


16. Make sure your router is using Dynamic Host Configuration Protocol (DHCP).

When a router is using DHCP, it automatically assigns internet protocol (IP) addresses to each device. Honeywell connected devices work best with DHCP.


17. Make sure your router isn't using any advanced security settings.

Advanced security settings include VPNs and network switches with separate firewalls.


18. Is your app pairing with your thermostat now?

  • YES – Congratulations! You've fixed your Wi-Fi issue! Continue to Step 1.
  • NO – Contact Support at 1-855-733-5465 to find a pro-installer in your area.


Already Registered

19. Do you know the previous owner?

  • YES – Contact the previous owner and tell them to delete your device from their Honeywell app or portal. Continue to the next step.
  • NO – Contact Support at 1-855-733-5465 to find a pro-installer in your area. Keep in mind that you'll need to be near your thermostat.


20. Is your thermostat still showing a registration error message?

  • YES – Contact Support at 1-855-733-5465 to find a pro-installer in your area.
  • NO – Congratulations! You've fixed your thermostat's registration error messages! You are now complete.


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