Thermostat shows large temperature swings; room is alternately too hot and too cold.

Safety: No mains work is required for parameter adjustments.

• Check location: Ensure the thermostat is installed on an interior wall away from drafts, direct sunlight, and radiators.
• Adjust control parameters: In the advanced settings, select the correct control type (e.g., TPI/PWM) and cycle time recommended for your Eurotronic actuators or boiler.
• Enable/adjust offset: If the displayed temperature is consistently off, use the temperature offset function to correct it based on a reference thermometer.
• Monitor performance: After changes, allow at least 24 hours to evaluate improvement.
• Replace thermostat: If swings remain severe and sensor readings are unstable, the internal sensor may be faulty and the thermostat should be replaced.