BoilerFaultCodes E05 High
Boiler Fault Code E05
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E05 appears across 21 boiler brands and 154 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's temperature sensor responsible for your heating system has developed a fault, meaning the boiler cannot accurately measure how hot the water is. (As reported on Potterton Gold Combi HE)
Pick your boiler brand for the E05 fix
Alpha E05 30 models Ariston E05 6 models Atag E05 3 models Baxi E05 7 models Biasi E05 12 models Ferroli E05 9 models Halstead E05 6 models Heatline E05 7 models Ideal E05 6 models Intergas E05 6 models Johnson Starley E05 11 models Keston E05 8 models Main E05 1 model Navien E05 6 models Potterton E05 5 models Ravenheat E05 9 models Remeha E05 8 models Saunier Duval E05 6 models Viessmann E05 1 model Vokera E05 6 models Warmhaus E05 1 model
Source
Information for the E05 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