Gives the Register Honeywell WiFi Thermostat RTH9580WF procedure online, on the Honeywell Total Connect Comfort (TCC) site. How to Register Honeywell WiFi Thermostat RTH9580WF: Prerequisite Steps 1. Install your the Thermostat Skip this step if you already installed your t-stat and it is showing its Home screen. If you haven’t, see our Honeywell Smart Thermostat … Continue reading How to Register Honeywell WiFi Thermostat RTH9580WF