How much does it cost to fix Ferroli error code 40?

Typical repair cost for the Ferroli 40 fault is £0-120 including labour.

40 Low

Ferroli 40 Fault Code

Q: What does the Ferroli 40 fault code mean?

Your boiler has paused temporarily because it has detected an unusual reading, but it should restart itself automatically once the system settles down.

The Ferroli 40 fault code means: your boiler has paused temporarily because it has detected an unusual reading, but it should restart itself automatically once the system settles down.. It appears on 3 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

Typical repair cost £0-120 (including labour)

DIY fix possible

Wait up to 15 minutes to see if the boiler clears the code and restarts itselfCheck that your radiators are bled and there is no trapped air in the systemEnsure the central heating system pressure is between 1.0 and 1.5 bar

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Ferroli models that show the 40 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ferroli 40 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 27 April 2026