BoilerFaultCodes Loss of water indicating light High
Boiler Fault Code Loss of water indicating light
Also written as LOSSOFWATERINDICATINGLIGHT — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Loss of water indicating light 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 stopped working because the water pressure inside the heating system has dropped too low. (As reported on Saunier Duval Sylva)
Pick your boiler brand for the Loss of water indicating light fix
Source
Information for the Loss of water indicating light 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