What should I do if my thermostat is already registered?

For Honeywell Home thermostats, you will need to register the thermostat. Call 1-800-633-3991 to get it set up. When you call, make sure you have the following information ready:

1. The MAC ID and CRC numbers for your thermostat.
2. Make sure the thermostat is online and connected to your local Wi-Fi network.
3. Check that you have created an account with the Resideo App.
4. Make sure you are near the thermostat during the call. This process will take 20-30 minutes to complete.