BoilerFaultCodesTechnical description
Ignition sequence (heating operation)
What causes this fault?
This status occurs when the boiler begins the physical process of lighting the burner to heat your radiators. It is a natural part of the start-up cycle where the system checks components and prepares the spark to ignite the gas. If the boiler stays on this code without moving forward, it usually means the system is struggling to successfully establish or detect a flame.
DIY fix possible
Check if the display changes to another S code or a numerical temperatureEnsure your thermostat or programmer is calling for heatMonitor the boiler to see if it moves past this status to a firing stageIf the code persists for a long period without heating, try a simple reset
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