Can I lock the neoStat? November 19, 2018 06:16 Updated Follow Yes. You can enter a PIN code that must be entered on the neoStat before any change can be made. Related articles Do the neoStat’s update for Winter/Summer Time ? I want central control as well as App Control, what are my options? Do I need to use a wiring centre? Unlocking your neoStat on the neoApp How can I unlock my thermostat?