BoilerFaultCodes Err HJ-09 High
Boiler Fault Code Err HJ-09
Also written as ERRHJ09 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Err HJ-09 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 has detected that there is not enough water pressure in the system to operate safely, which has caused it to shut down. (As reported on Daikin D2TND024)
Pick your boiler brand for the Err HJ-09 fix
Source
Information for the Err HJ-09 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