54 Low

Saunier Duval 54 Fault Code

The Saunier Duval 54 fault code means: your boiler's fan speed setting is currently at its maximum limit, which is part of the system's internal calibration process.. It appears on 1 Saunier Duval model in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: In the fully clockwise position the display should be indicating the maximum fan speed of the appliance, this should be 54.

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 54 fault code

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

Source

Saunier Duval 54 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