How do I factory reset the Z-Wave bridge on the XL824?

Navigate to Home Screen > Menu > Smart Home > Advanced and select Factory Reset. This resets all Z-Wave information and removes all devices from the bridge, and if the bridge is the primary controller, all devices in the network will be removed. After the reset, it will be necessary to remove and then re-add all devices back to your network.

From the official Trane XL824 Smart Wi-Fi Thermostat manual, page 28

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