Boiler display shows normal operation but building does not reach set room temperature.

Safety first: Adjust controls gradually to avoid overheating.

• Check room controller settings: Verify the desired room temperature and schedule on the Weishaupt room unit.
• Adjust heating curve: On weather-compensated systems, slightly increase the slope or parallel shift of the heating curve.
• Relocate room sensor: If the sensor is in a draught or direct sunlight, have it moved to a representative location.
• Check radiator output: Ensure radiators are not obstructed by furniture and that TRVs are set appropriately.

When to call a professional: Persistent underheating may require a heat loss calculation and system upgrade.