BoilerFaultCodes 16.12 Low
Boiler Fault Code 16.12
Also written as 1612 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 16.12 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 performing a routine self-check of its heating power output and is not reporting an active fault. (As reported on Glow-worm EnergySaver)
Pick your boiler brand for the 16.12 fix
Source
Information for the 16.12 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