BoilerFaultCodesIntergas F000 Fault Code
The Intergas F000 fault code means: your boiler has stopped working because an internal temperature sensor is reporting an error and needs to be checked.. It appears on 4 Intergas models in our database.
Technical description: Sensor S0 is defective.
What causes the Intergas F000 fault?
This fault occurs when the boiler's main internal temperature sensor fails to send a consistent electrical signal back to the central control board. The most common reason is that the sensor has suffered a physical failure or the wiring connecting it has become loose or damaged over time. Because the boiler can no longer accurately monitor how hot the water is, it shuts down as a safety precaution to prevent overheating.
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 F000 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Intergas F000 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