BoilerFaultCodes Fault 53 128 High
Boiler Fault Code Fault 53 128
Also written as FAULT53128 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Fault 53 128 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 a temperature sensor is sending an unusual reading, suggesting it may have been knocked out of place or is reporting a sudden, impossible heat spike. (As reported on Worcester Bosch Greenstar CDi Compact)
Pick your boiler brand for the Fault 53 128 fix
Source
Information for the Fault 53 128 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