BoilerFaultCodes No display, boiler working OK Low
Boiler Fault Code No display, boiler working OK
Also written as NODISPLAYBOILERWORKINGOK — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code No display, boiler working OK appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is continuing to provide heating and hot water as normal, but the digital screen has gone blank. (As reported on Vokera Pinnacle)
Pick your boiler brand for the No display, boiler working OK fix
Source
Information for the No display, boiler working OK fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026