E30 High

Boiler Fault Code E30

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code E30 appears across 12 boiler brands and 33 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 problem with the sensor that monitors the temperature of the water leaving the unit, usually resulting in the system shutting down for safety. (As reported on Potterton Powermax HE)

Pick your boiler brand for the E30 fix

Ariston E30 2 models Baxi E30 1 model Biasi E30 1 model Chaffoteaux E30 1 model Halstead E30 6 models Johnson Starley E30 1 model Keston E30 9 models Main E30 1 model Navien E30 6 models Potterton E30 1 model Remeha E30 2 models Vokera E30 2 models

Source

Information for the E30 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