Fan does not run High

Saunier Duval Fan does not run Fault Code

Also written as FANDOESNOTRUN — same fault.

The Saunier Duval Fan does not run fault code means: your boiler is unable to safely move air for the combustion process, which means the unit cannot fire up to provide heating or hot water.. It appears on 1 Saunier Duval 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: Fan motor failure or power issue. Check 230V~ at motor connections; if present replace fan. If not, test fan harness and PCB.
Typical repair cost £200-350 (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 Fan does not run fault code

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

Source

Saunier Duval Fan does not run 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 27 April 2026