If you know the previous owner, ask them to delete the thermostat from their account (within the app, they'll tap Settings, then Thermostat Configuration, then Delete Thermostat). If you don't know the previous owner, contact Customer Care to unregister the thermostat at 1-800-633-3991.. Honeywell account information (username and password) Unregistering Honeywell Thermostat from the App. Step 1: Open the Honeywell Home App Launch the Honeywell Home app on your smartphone or tablet. Step 2: Select My Account Tap the "My Account" icon located in the top right corner of the screen. Step 3: Choose Devices Under "My Account," select the "Devices" tab. Step 4: Find Your.

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The T6 Thermostat can be unregistered by following the below procedure: Login into the Resideo - Smart Home app. Tap on the thermostat's name. Tap on the settings cogwheel button (top right corner). Select "Thermostat Configuration". Select "Delete Thermostat". Press "DELETE" to confirm.. Now, let's get down to the specifics of unregistering your Honeywell thermostat. The process can vary slightly depending on the specific model and whether you have an online account. Here's a comprehensive guide that covers most scenarios: 1. Identify Your Thermostat Model. The first step is to identify the specific model of your Honeywell.