Article reference KA-02017
The backlight on the screen of the towel rail, will by default time out after a few seconds of no keypress activity. There is also an option to have the backlight on the screen illuminate continuously.
Follow this video guide which explains how to adjust the setting:
Applicable to models: TRM21W4, TRM14W5, TRM21W5, TRM28W5, TRM21C4, TRM14C5, TRM21C5, TRM28C5, CTR7W, CTR7C, CTR10W, CTR10C, CTR12W, CTR12C