Room temperature overshoots setpoint by several degrees; rooms become too hot before boiler switches off.

Safety first: Low‑risk adjustment and relocation work only.

• Check thermostat location:
  • Ensure the Ferroli thermostat is on an internal wall, about 1.5 m above floor level.
  • Avoid locations near doors, windows, radiators, or direct sunlight.
• Relocate if necessary:
  • Have a competent person move the thermostat base and low‑voltage wiring to a better location.
• Adjust control parameters:
  • Reduce the heating curve or maximum flow temperature for underfloor systems.
  • Decrease hysteresis so the boiler turns off closer to the setpoint.
• Monitor performance:
  • After changes, observe room temperature over several cycles and fine‑tune settings.