How much does it cost to fix boiler error code C14?

Typical repair cost for the boiler C14 fault is £120-200 including labour.

C14 High

Boiler Fault Code C14

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code C14 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 has detected that the water trap responsible for disposing of condensation is potentially blocked or not draining correctly, causing it to shut down to prevent internal water damage. (As reported on Atag Premier)

Pick your boiler brand for the C14 fix

Atag C14 1 model

Source

Information for the C14 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