BoilerFaultCodes P.08 Low
Boiler Fault Code P.08
Also written as P08 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code P.08 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 currently in a manual mode used for filling the system with water or draining it, rather than operating in normal heating mode. (As reported on Glow-worm Compact)
Pick your boiler brand for the P.08 fix
Source
Information for the P.08 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 7 July 2026