Boiler cycles on and off rapidly without reaching set temperature

Safety first: Short cycling reduces boiler life and efficiency but is not usually an immediate safety risk.

• Open radiators: Ensure enough radiators are open to absorb the boiler’s output.
• Check thermostat location: The room thermostat should not be near heat sources or in direct sunlight.
• Adjust heating curve: For weather-compensated Nibe systems, lower the heating curve slightly to reduce overshoot.
• Professional review: A Nibe technician can optimise settings, check pump modulation, and advise if system changes (e.g., buffer tank) are needed.