Homeowner Wi-Fi pairing guide, 7-day schedule programming, and 24VAC C-wire requirement setup for the Honeywell RTH6580WF.
Wi-Fi Registration Walkthrough
Connect your smartphone to the New Honeywell Thermostat Wi-Fi network, browse to 192.168.1.1, and select your 2.4GHz home Wi-Fi network.
C-Wire Power Requirements
The RTH6580WF strictly requires a 24VAC Common wire (C terminal) to maintain continuous Wi-Fi connectivity. If no C-wire is present, install a Honeywell C-Wire Power Adapter at the furnace control board.
Wi-Fi Error Codes
If the Wi-Fi icon flashes continuously, check that your router broadcasts a 2.4GHz network (5GHz Wi-Fi is not supported).