What the manual says
Manufacturer manualBoiler stand-by
Shared across the Excel 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
Check your room thermostat to ensure it is set higher than the current room temperature.Check your timer or programmer to see if a heating or hot water schedule is currently active.Turn on a hot water tap to see if the boiler successfully fires up to provide hot water.
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All 9 fault codes on the Excel
Seeing a different code? Every code this model can display, in one place.