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info Honeywell
Status Wi-Fi Setup
The thermostat is in Wi-Fi setup mode and needs to be connected to a home network.
? What Causes This
Thermostat has not yet been connected to a Wi-Fi network, or Wi-Fi setup was selected.
ⓘ What This Means
Follow the Wi-Fi setup procedure starting on page 26 to connect to your home network.
Source: page 27 of the official manual
From the manual
This error code appears in:
Honeywell RTH6580WF Wi-Fi Smart Thermostat