How much does it cost to fix boiler error code S13?

Typical repair cost for the boiler S13 fault is £100-280 including labour.

S13 High

Boiler Fault Code S13

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code S13 appears across 1 boiler brand and 4 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is struggling to light properly when you turn on your hot water taps. (As reported on Vaillant ecoTEC Pro / ecoTEC Plus)

Pick your boiler brand for the S13 fix

Vaillant S13 4 models

Source

Information for the S13 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