Re-registering the Smart Si Thermostat
There are times when you may need to re-register your Smart Si thermostat. For example, if you are a new homeowner who has just moved to a home with an existing Smart Si thermostat. To re-register your Smart Si thermostat, reset the registration and redo the registration process.
To reset your registration: From the Home screen, press Menu > Settings > Reset > Reset Registration. Confirm the reset by selecting Yes.