How much does it cost to fix boiler error code E133?

Typical repair cost for the boiler E133 fault is £120-350 including labour.

E133 High

Boiler Fault Code E133

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code E133 appears across 3 boiler brands and 51 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has tried to light several times but cannot establish a steady flame, likely because gas isn't reaching it or the spark is failing. (As reported on Potterton Gold Combi HE)

Pick your boiler brand for the E133 fix

Baxi E133 32 models Main E133 5 models Potterton E133 14 models

Source

Information for the E133 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