Z-Wave devices require a separate command and physical confirmation from the device itself (usually a button press) in order to be reset (or “excluded”) and removed from a controller (like the SmartThings Hub).
Note: In order to exclude a Z-Wave device in the SmartThings app, you must have the physical device with you and be within the range of the SmartThings Hub.
Your Hub will enter exclusion mode automatically when you remove a Z-Wave device is removed from the Devices menu.
For more information and link to the original Samsung Smarthings support document click here
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