E16 High

Boiler Fault Code E16

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code E16 appears across 6 boiler brands and 16 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 a fault with a secondary temperature sensor that monitors water returning to the unit, causing it to stop operating for safety. (As reported on Warmhaus Enerwa)

Pick your boiler brand for the E16 fix

Ariston E16 2 models Biasi E16 2 models ECA E16 4 models Ideal E16 6 models Vokera E16 1 model Warmhaus E16 1 model

Source

Information for the E16 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