BoilerFaultCodesWhat the manual says
Manufacturer manualHeat demand lower than energy supplied
Shared across the Greenstar 8000 F 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.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Related fault codes
All 99 fault codes on the Greenstar 8000 F
Seeing a different code? Every code this model can display, in one place.
2002012022032042082142242272282292322332342352372382422442452492502512522532542572582592622632682692732812832843053063573583603623636048151010101310171018101910211023102510371065106810701071107210751076208529082910291429152916292029232924292529262927292829312940294629482949295029512952295529562957296129622963296529662968296929702971297229802981
Related guides you might find useful
Hot water works but heating does not
On a combi it is usually the diverter valve. On a system boiler, the motorised valve.
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One cold radiator is usually a stuck valve pin or trapped air.
Read →No hot water but heating works
Almost always a stuck diverter valve on a combi.
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