BoilerFaultCodesIntergas F008 Fault Code
The Intergas F008 fault code means: your boiler has stopped working because the fan that clears exhaust gases from the unit is not spinning at the correct speed.. It appears on 4 Intergas models in our database.
Technical description: Incorrect fan speed
What causes the Intergas F008 fault?
This fault occurs when the boiler's internal computer detects that the fan is not spinning at the required speed to safely clear exhaust gases. The most common reasons are a mechanical failure within the fan motor itself or a communication issue where the control board can no longer send signals to the fan. In some cases, loose or damaged internal wiring can also prevent the fan from receiving the power it needs to start.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Intergas models that show the F008 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Intergas F008 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