E27 Low

Boiler Fault Code E27

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code E27 appears across 6 boiler brands and 23 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is having trouble reading the outside temperature and is unable to adjust your heating efficiently. (As reported on Intergas Combi Compact Eco RF)

Pick your boiler brand for the E27 fix

Alpha E27 7 models Ariston E27 2 models Intergas E27 6 models Johnson Starley E27 1 model Navien E27 6 models Vokera E27 1 model

Source

Information for the E27 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