Saunier Duval Neon 2 Fault Code

Also written as NEON2 — same fault.

The Saunier Duval Neon 2 fault code means: your boiler has stopped working because a safety switch has detected that the unit became too hot and triggered a shutdown.. It appears on 2 Saunier Duval models in our database.

Technical description: Is neon 2 lit? NO: For gravity domestic hot water systems only, check continuity of yellow link. For fully pumped systems, check overheat reset. If satisfactory replace overheat device.