Can the back light stay on permanently? November 19, 2018 07:58 Updated Follow No, the back light cannot be set to stay on. The light will turn off automatically after 30 seconds from the last key press. Related articles What is the difference between neoStat v1 and v2 Why does my heating come on when I don't expect it? I want my neoStat to switch the heating on when the temperature drops 0.5C below my set temperature Setting up the Remote Sensor Optimum Start Explained