Boiler Fault Code 290 / F0

Also written as 290F0 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026

Fault code 290 / F0 appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's internal computer has flagged a failure in its ability to read data from electronic sensors, preventing it from operating safely. (As reported on Worcester Bosch Greenstar CDi Compact)