BoilerFaultCodesTechnical description
Central heating thermostat knob turned off or no heat demand by the eBUS control unit
What causes this fault?
This status occurs because the central heating function has been manually deactivated, often by turning the heating control dial all the way to the left. It signifies that the boiler is intentionally ignoring requests for heating while remaining ready to provide hot water. In some cases, this may also be triggered by an external smart controller or weather compensation sensor telling the boiler that heat is not required.
This is most common during the spring and summer months when homeowners intentionally disable their radiators to save energy.
DIY fix possible
Locate the radiator symbol button or dial on the boiler control panel.Increase the heating temperature setting or turn the dial clockwise.Ensure your room thermostat is turned up to a temperature higher than the current room temperature.