BoilerFaultCodesWhat the manual says
Manufacturer manualService mode selected to max, press service button to return to normal.
Shared across the Greenstar range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
DIY fix possible
Locate the button with a 'spanner' or 'service' icon on the control panel.Press and hold the service button briefly until the display or light returns to its normal status.The boiler should now respond to your thermostat and hot water taps as usual.
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All 35 fault codes on the Greenstar 24i / 28i Junior
Seeing a different code? Every code this model can display, in one place.