BoilerFaultCodesFerroli 43 Fault Code
The Ferroli 43 fault code means: your boiler has detected that the water inside the system has become too hot and has temporarily turned itself off to cool down, which it should fix automatically.. It appears on 2 Ferroli models in our database.
Technical description: Temporary shutdown fault - resets automatically as soon as the value comes back within the boiler’s normal working range
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 43 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ferroli 43 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