BoilerFaultCodesTechnical description
Anti cycling mode (after heating operation)
What causes this fault?
This status occurs when the boiler has reached its target temperature and shuts down briefly to prevent 'short-cycling,' which is when the unit turns on and off too quickly. It physically happens because the heat produced by the burner cannot be moved away into your radiators fast enough, often because the house is already warm or the radiator valves have closed. This pause protects the internal components from unnecessary wear and tear while ensuring the system runs efficiently.
This is more common during the autumn and spring when the weather is milder and your home requires less heat to stay comfortable.
DIY fix possible
Check that your room thermostat is turned up high enough to call for heat.Ensure your radiator valves are open to allow heat to dissipate.Wait 15-20 minutes for the countdown to end, as the boiler will restart automatically.