Thermostat shows 'Frost Protect Active'; heating runs even when schedule is off and setpoint appears low.

Safety first: Frost protection is a safety feature to prevent freezing; do not disable it entirely in cold climates.

• Check room temperature: Verify the actual room temperature with a separate thermometer. If genuinely low, the system is working as designed.
• Adjust frost setpoint: In the installer or advanced settings, adjust the frost protection temperature (commonly 5–8°C) to a suitable level.
• Relocate thermostat: If the thermostat is in a very cold or draughty area (e.g. porch, near external door), consider relocating it to a representative room.
• Check for sensor error: If the displayed temperature is clearly wrong, there may be a sensor fault; see sensor‑related entries.