BoilerFaultCodesWorcester Bosch F Fault Code
The Worcester Bosch F fault code means: your boiler has detected an unspecified internal problem and has shut down as a safety precaution.. It appears on 5 Worcester Bosch models in our database.
Technical description: Other faults not covered by above
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Worcester Bosch models that show the F fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch F fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.
- Worcester Bosch 24/28/35 CDi MkII manual (PDF)
- Worcester Bosch 24i / 28i Junior manual (PDF)
- Worcester Bosch 9/14 - 19/24 CBi manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026