F25 High

Ferroli F25 Fault Code

The Ferroli F25 fault code means: your boiler's internal computer brain has encountered a glitch or software error that is preventing it from running properly.. It appears on 4 Ferroli models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Software fault
Typical repair cost £180-450 (including labour)

DIY fix possible

Locate the 'Reset' button on the front control panel.Press and hold the button for 2 to 3 seconds.Wait for the boiler to complete its restart sequence.

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Ferroli models that show the F25 fault code

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

Source

Ferroli F25 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