BoilerFaultCodesFerroli F14 Fault Code
The Ferroli F14 fault code means: your boiler has stopped working because it cannot correctly measure the temperature of the water leaving the unit.. It appears on 10 Ferroli models in our database.
Technical description: Flow sensor error – t-sensor damaged, short circuited, sensor damaged or wiring broken
What causes the Ferroli F14 fault?
This fault occurs when the boiler's internal computer loses communication with the sensor that monitors the temperature of the water being sent to your radiators. The most common reason is that the sensor has physically failed or developed an electrical short, though it can also be caused by loose or damaged wiring between the sensor and the main control board.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Ferroli models that show the F14 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ferroli F14 fault code information on this page is sourced and cross-checked against the official Ferroli service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026