How much does it cost to fix boiler error code Fault 54?

Typical repair cost for the boiler Fault 54 fault is £90-250 including labour.

Fault 54 Low

Boiler Fault Code Fault 54

Also written as FAULT54 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Fault 54 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 automatic routine to heat your solar hot water tank to a safe, bacteria-killing temperature has failed to complete. (As reported on Worcester Bosch Greenstar CDi Compact)

Pick your boiler brand for the Fault 54 fix

Worcester Bosch Fault 54 1 model

Source

Information for the Fault 54 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