BoilerFaultCodes E09 High
Boiler Fault Code E09
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E09 appears across 15 boiler brands and 95 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 that either a temperature sensor in the exhaust pipe is faulty or the main heating component is becoming blocked and dirty. (As reported on Vokera Mynute Vhe)
Pick your boiler brand for the E09 fix
Alpha E09 10 models Ariston E09 1 model Baxi E09 24 models Biasi E09 6 models Ferroli E09 1 model Heatline E09 2 models Johnson Starley E09 7 models Keston E09 9 models Main E09 1 model Potterton E09 5 models Ravenheat E09 9 models Remeha E09 7 models Saunier Duval E09 6 models Viessmann E09 1 model Vokera E09 6 models
Source
Information for the E09 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