Main burner not operating High

Saunier Duval Main burner not operating Fault Code

Q: What does the Saunier Duval Main burner not operating fault code mean?

Your boiler is failing to ignite the main flame because of a problem with the internal electronics or wiring that controls the fuel supply.

Q: How much does it cost to fix Saunier Duval error code Main burner not operating?

Typical repair cost for the Saunier Duval Main burner not operating fault is £150-300 including labour.

Also written as MAINBURNERNOTOPERATING — same fault.

The Saunier Duval Main burner not operating fault code means: your boiler is failing to ignite the main flame because of a problem with the internal electronics or wiring that controls the fuel supply.. It appears on 2 Saunier Duval models in our database.

Technical description: Multi-functional control/harness problem

Typical repair cost £150-300 (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 Main burner not operating fault code

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

Source

Saunier Duval Main burner not operating 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