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info Honeywell

Status NEED TO REGISTER ONLINE

Sign in to the Resideo App and follow the instructions to add a thermostat.

? What Causes This

The thermostat has not been registered with the Resideo app.

ⓘ What This Means

Open the Resideo app on your smartphone.
Sign in with your credentials.
Follow the on-screen instructions to add and register the thermostat.

This error code appears in:

Honeywell T10 Smart Home Thermostat