Room temperature overshoots setpoint by several degrees before boiler turns off.

Safety note: Most corrections are via settings and positioning; no mains work is usually required.

Steps to improve control:

• 1. Check thermostat location: Ensure it is on an internal wall, about 1.5 m above floor, away from radiators, sunlight, and draughts.
• 2. Adjust control parameters: In the installer menu, set the control type appropriate to the system (e.g. TPI for radiators, slower cycles for underfloor heating) as recommended by Baxi.
• 3. Use temperature offset: If the thermostat consistently reads lower than actual, apply a small offset so that control is more accurate.
• 4. Enable learning features: If available, enable adaptive or learning algorithms that anticipate overshoot.

When to call a professional: If overshoot remains severe despite correct placement and settings, the sensor or control board may be faulty and the thermostat should be evaluated or replaced.