BoilerFaultCodes Water pressure High
Boiler Fault Code Water pressure
Also written as WATERPRESSURE — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Water pressure appears across 2 boiler brands and 9 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has detected that the amount of water circulating through your heating system is too low, so it has safely stopped working to prevent any damage. (As reported on Saunier Duval Thema F 30 E Plus)
Pick your boiler brand for the Water pressure fix
Source
Information for the Water pressure 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