BoilerFaultCodesIntergas F009 Fault Code
The Intergas F009 fault code means: your boiler's main internal computer has developed a technical error and can no longer communicate with the burner safely.. It appears on 4 Intergas models in our database.
Technical description: Internal fault in burner controller.
What causes the Intergas F009 fault?
This fault occurs when the boiler's main control centre suffers an internal electronic failure and loses its ability to manage the burner safely. The most common reason is a hardware malfunction within the printed circuit board, often triggered by age or an electrical surge that disrupts the sensitive components required to run the unit.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A cover plan would handle faults like F009: no call-out fees, no surprise bills.
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Intergas models that show the F009 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Intergas F009 fault code information on this page is sourced and cross-checked against the official Intergas service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026