How much does it cost to fix boiler error code 154?

Typical repair cost for the boiler 154 fault is £150-350 including labour.

154 Medium

Boiler Fault Code 154

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 31 August 2026

Fault code 154 appears across 3 boiler brands and 16 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 an abnormal temperature difference between the water leaving it and the water returning, which usually indicates a circulation problem inside the system. (As reported on Atag iC28)

Pick your boiler brand for the 154 fix

Atag 154 3 models Baxi 154 7 models Potterton 154 6 models

Source

Information for the 154 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 31 August 2026