BoilerFaultCodesIntergas F02 Fault Code
The Intergas F02 fault code means: your boiler has stopped working because one of its internal heat sensors has developed a fault and can no longer read the temperature correctly.. It appears on 3 Intergas models in our database.
Technical description: S2 sensor short circuit
What causes the Intergas F02 fault?
This fault occurs when the boiler's control system detects that the S2 temperature sensor has developed an electrical short circuit, meaning it can no longer safely track the heat level. The most common reason is that the sensor's internal components have failed due to age or heat stress, or moisture has compromised the electrical connections. Because the boiler doesn't know the exact temperature of the water, 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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Gas Safe Register →Intergas models that show the F02 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Intergas F02 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