BoilerFaultCodesWhat the manual says
Manufacturer manualsummer mode
What causes this fault?
This status occurs when the central heating function has been manually deactivated on the control panel, leaving only the hot water operational. It is typically caused by a user changing the settings to prevent the radiators from coming on while still needing hot water for taps and showers.
This is most common during the summer months when homeowners intentionally switch off their heating to save energy.
DIY fix possible
Locate the temperature control knob for the central heating on the boiler fasciaTurn the dial clockwise to set the desired heating temperatureCheck that the 'sun' symbol has changed or disappeared, indicating the boiler is no longer in summer mode
Avoid the next call-out bill
A cover plan would handle faults like S.31: no call-out fees, no surprise bills.
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