How much does it cost to fix boiler error code E55?

Typical repair cost for the boiler E55 fault is £100-250 including labour.

E55 High

Boiler Fault Code E55

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code E55 appears across 2 boiler brands and 24 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's internal computer has detected that its gas and air settings need recalibrating to ensure it burns fuel efficiently and safely. (As reported on Potterton Promax HE)

Pick your boiler brand for the E55 fix

Baxi E55 23 models Potterton E55 1 model

Source

Information for the E55 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