BoilerFaultCodesTechnical description
Summer/Winter function
What causes this fault?
This status occurs when the heating system has been manually or automatically switched to its summer setting to save energy. It physically prevents the boiler from sending heat to your radiators while still allowing it to provide hot water for your taps and showers. The boiler is not actually broken; it is simply following an instruction to prioritise hot water over room heating.
This code is most frequently seen during the spring and summer months when homeowners turn off their heating as the outdoor temperature rises.
DIY fix possible
Locate the radiator temperature dial or button on the boiler control panelTurn the dial clockwise or press the '+' button to increase the target heating temperatureCheck that the display no longer shows 'Summer' or the radiator icon with a cross through it