Underfloor heating controlled by the thermostat is slow to warm up and rooms never reach the set temperature.

Safety: Turn off boiler and pump power before working on hydraulic components; leave boiler internals to professionals.

• Check setpoints: Ensure the room setpoint and maximum floor temperature are appropriate for your floor type.
• Increase flow temperature: If allowed, raise the boiler’s heating flow temperature slightly, staying within floor manufacturer limits.
• Bleed circuits: Have the underfloor manifold circuits bled to remove air, which reduces heat transfer.
• Verify sensor: Confirm the floor sensor is installed in the heated area, not near external walls or unheated zones.