BoilerFaultCodesIntergas F10 Fault Code
The Intergas F10 fault code means: your boiler has detected a fault with the sensor that monitors water returning from your radiators, preventing the system from heating up safely.. It appears on 3 Intergas models in our database.
Technical description: Return sensor short circuit
What causes the Intergas F10 fault?
This fault occurs when the sensor responsible for measuring the temperature of the water returning to the boiler develops an electrical shortcut. The most common reason is that the internal component of the sensor has failed or the protective insulation on the connecting wires has worn away, causing a constant, incorrect electrical signal.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Intergas models that show the F10 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Intergas F10 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