BoilerFaultCodesIntergas F002 Fault Code
The Intergas F002 fault code means: your boiler has detected that the water temperature is getting too hot while you are trying to use your taps or shower, causing it to shut down for safety.. It appears on 5 Intergas models in our database.
Technical description: Temperature too high during DHW demand.
What causes the Intergas F002 fault?
This fault occurs when the water temperature within the boiler climbs too quickly or exceeds safe limits while you are using your hot water. It is usually caused by a blockage or a component failure that prevents heat from being transferred away from the burner and into your taps effectively. Common culprits include a faulty temperature sensor giving incorrect readings or a stuck diverter valve that isn't directing the hot water where it needs to go.
This fault can be more noticeable in summer when the incoming mains water is naturally warmer, giving the boiler less 'room' to manage high temperatures before hitting a safety limit.
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 F002 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Intergas F002 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