vSMART app or thermostat indicates 'Open window detected' and temporarily reduces or stops heating in that room.

Steps to manage open‑window detection:

• Check for draughts: Confirm whether a window or door is actually open near the thermostat. Close it if you want normal heating to resume.
• Wait for recovery: The system usually resumes normal operation automatically after a short period once the temperature stabilizes.
• Relocate thermostat: If false detections are frequent, move the thermostat away from direct draughts or poorly insulated external walls.
• Adjust feature (if available): In the app, reduce the sensitivity of open‑window detection or disable the feature if it causes nuisance interruptions.

This is not a hardware fault unless temperature readings are unstable; in that case, check the sensor and installation location.