BoilerFaultCodesWorcester Bosch F0279 Fault Code
The Worcester Bosch F0279 fault code means: your boiler's main internal computer has developed a serious internal fault and cannot safely manage the burner.. It appears on 1 Worcester Bosch model in our database.
Technical description: The burner control unit, or KIM, is faulty – control unit may need replacing
What causes the Worcester Bosch F0279 fault?
This fault occurs when the boiler's internal computer chips suffer a critical communication failure or hardware breakdown. It is typically caused by electrical wear over time or a sudden power surge that damages the delicate circuitry required to manage the burner safely.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Worcester Bosch models that show the F0279 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch F0279 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