What does the Saunier Duval Main burner does not light fault code mean?

Your boiler is failing to ignite because an internal electrical component responsible for releasing gas is not receiving a signal.

How much does it cost to fix Saunier Duval error code Main burner does not light?

Typical repair cost for the Saunier Duval Main burner does not light fault is £180-350 including labour.

Check continuity of main solenoid between EV2 and COM. If OK, replace multi-functional control. If no continuity, replace main solenoid.

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.