Thermostat fails to detect open windows or does not activate energy-saving features when windows are opened.

Safety: No mains work required.

• Check feature settings: Ensure open-window detection is enabled in the thermostat or app settings.
• Pair sensors: If using Ariston-compatible window/door sensors, confirm they are correctly paired and assigned to the right room.
• Test manually: Open a window for several minutes and observe if the thermostat detects a rapid temperature drop; adjust sensitivity if configurable.
• Use external contact input: For wired contacts, verify they are connected to the correct input terminals and that the input type (NO/NC) is set correctly.