Boiler frequently short cycles (starts and stops every few minutes)

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

• Increase system load: Ensure enough radiators or underfloor zones are open when the boiler runs.
• Lower flow temperature: Reduce the heating setpoint on the ACV boiler to lengthen run times.
• Check controls: Avoid overlapping multiple timeclocks or thermostats that cause rapid on/off commands.
• Professional optimization: A technician should adjust pump speed, bypass valve, and possibly enable modulation or weather compensation features.