BoilerFaultCodesIntergas F006 Fault Code
The Intergas F006 fault code means: your boiler thinks it sees a flame even when it hasn't started the burner yet, which is a safety conflict that prevents it from firing up.. It appears on 5 Intergas models in our database.
Technical description: Flame simulation.
What causes the Intergas F006 fault?
This fault occurs when the boiler's sensors detect an electrical current and assume a flame is present before the gas has even been ignited. This is usually caused by a faulty ionisation electrode sending a false signal or moisture and carbon build-up creating an electrical 'leak' back to the control board. For safety, the system refuses to start the ignition sequence to prevent gas from entering a chamber it believes is already lit.
This fault is more common during periods of high humidity or heavy rainfall, as moisture ingress can affect the electrical sensitivity of the ignition components.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Intergas models that show the F006 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Intergas F006 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 27 April 2026