BoilerFaultCodes 00:5 Low
Boiler Fault Code 00:5
Also written as 005 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 00:5 appears across 1 boiler brand and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is correctly configured for your specific heating setup and this code is simply informing you how your system is currently set up to operate. (As reported on Viessmann Vitodens 200)
Pick your boiler brand for the 00:5 fix
Source
Information for the 00:5 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