F2 High

Saunier Duval F2 Fault Code

The Saunier Duval F2 fault code means: your boiler has stopped working because a protective electrical fuse inside the control unit has blown, cutting off power to key components.. It appears on 4 Saunier Duval 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: PCB Fuse (F1A). Before using the fault finding chart ensure all wiring is correct and in good condition, the pump is not faulty and check the PCB fuse F2
Typical repair cost £120-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Saunier Duval models that show the F2 fault code

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

Source

Saunier Duval F2 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 7 July 2026