How much does it cost to fix boiler error code 172?

Typical repair cost for the boiler 172 fault is £90-180 including labour.

172 High

Boiler Fault Code 172

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code 172 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 an external safety device or secondary system limit has been triggered, causing the unit to shut down for protection. (As reported on ECA FELiS FL 50 HM)

Pick your boiler brand for the 172 fix

ECA 172 1 model

Source

Information for the 172 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