BoilerFaultCodesTechnical description
Max burner anti-cycling period at 20c flow temperature
What causes this fault?
This occurs when your boiler reaches its target heat and shuts off to prevent the system from overheating or wasting energy. Rather than turning on and off rapidly, which can damage internal components, the boiler enters a programmed 'resting' phase until the water temperature drops enough to justify restarting. This is a normal safety and efficiency feature rather than a mechanical failure.
This status is more frequent during mild spring or autumn days when your radiators don't need maximum heat to keep your home warm.
DIY fix possible
Check that your room thermostat or programmer is set to a high enough temperatureOpen any radiator valves (TRVs) fully in the room with the main thermostatWait 15 minutes to see if the status code clears and the boiler fires back up automatically