F0 279 High

Worcester Bosch F0 279 Fault Code

Also written as F0279 — same fault.

The Worcester Bosch F0 279 fault code means: your boiler's internal computer has developed an electrical fault and can no longer safely control the flame, meaning the system has shut itself down.. It appears on 10 Worcester Bosch models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: The burner control unit, or KIM, is faulty – control unit may need replacing
Typical repair cost £280-£450 (including labour)

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 F0 279 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Worcester Bosch F0 279 fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.

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