E135 High

Boiler Fault Code E135

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code E135 appears across 3 boiler brands and 27 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has lost its connection to the gas supply due to an internal electronic communication failure, meaning it cannot ignite to provide heat or hot water. (As reported on Baxi 600 Combi (range))

Pick your boiler brand for the E135 fix

Baxi E135 24 models Main E135 1 model Potterton E135 2 models

Source

Information for the E135 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