BoilerFaultCodesSaunier Duval F14 Fault Code
The Saunier Duval F14 fault code means: your boiler has shut down because the water inside the central heating system has reached an unsafely high temperature.. It appears on 2 Saunier Duval models in our database.
Technical description: Central heating flow T° > 95°C
DIY fix possible
Check that all radiator valves are fully openEnsure the boiler pressure gauge is between 1.0 and 1.5 barSwitch the boiler off and back on again to reset the system after it has cooled down
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Saunier Duval models that show the F14 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Saunier Duval F14 fault code information on this page is sourced and cross-checked against the official Saunier Duval service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026