BoilerFaultCodes P1.0-2.9 Low
Boiler Fault Code P1.0-2.9
Also written as P1029 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code P1.0-2.9 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 operating normally and showing that the system pressure is at a healthy level while the water is warm. (As reported on Potterton Powermax HE)
Pick your boiler brand for the P1.0-2.9 fix
Source
Information for the P1.0-2.9 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