How much does it cost to fix Saunier Duval error code Does main burner light? (NO)?

Typical repair cost for the Saunier Duval Does main burner light? (NO) fault is £180-350 including labour.

Does main burner light? (NO) High

Saunier Duval Does main burner light? (NO) Fault Code

Q: What does the Saunier Duval Does main burner light? (NO) fault code mean?

Your boiler is failing to ignite because it is not receiving the necessary electrical signal to release the gas required for the flame.

Also written as DOESMAINBURNERLIGHTNO — same fault.

The Saunier Duval Does main burner light? (NO) fault code means: your boiler is failing to ignite because it is not receiving the necessary electrical signal to release the gas required for the flame.. It appears on 2 Saunier Duval models in our database.

Technical description: Is there 230V~ between main multi-functional control solenoid black and blue cables? If NO, isolate supply, test harness and replace as required. If YES, replace multi-functional control.

Typical repair cost £180-350 (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 Does main burner light? (NO) fault code

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

Source

Saunier Duval Does main burner light? (NO) 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