How much does it cost to fix boiler error code E03-826?

Typical repair cost for the boiler E03-826 fault is £250-400 including labour.

E03-826 High

Boiler Fault Code E03-826

Also written as E03826 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code E03-826 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's fan, which is responsible for safely venting exhaust gases outside, has stopped working correctly, causing the system to shut down for safety reasons. (As reported on Potterton Kingfisher MF RSL)

Pick your boiler brand for the E03-826 fix

Potterton E03-826 1 model

Source

Information for the E03-826 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 7 July 2026