F64 High

Ferroli F64 Fault Code

The Ferroli F64 fault code means: your boiler has been manually reset too many times in a short period and has temporarily locked itself for safety reasons.. It appears on 1 Ferroli model 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: Maximum number of consecutive Resets exceeded — disconnect power for 60 seconds
Typical repair cost £0-120 (including labour)

DIY fix possible

Locate the boiler power switch or plug nearby.Turn the power off completely for at least 60 seconds.Turn the power back on and wait for the boiler to restart.

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Ferroli models that show the F64 fault code

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

Source

Ferroli F64 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 7 July 2026