Boiler Fault Code 228 / F7

Also written as 228F7 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026

Fault code 228 / F7 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 an internal sensor reading that suggests it might behave unexpectedly if it tries to light, so it has stopped itself as a safety precaution. (As reported on Worcester Bosch Greenstar CDi Compact)