BoilerFaultCodesTechnical description
Flame detection fault. Check flame sensing electrode connections. Check for a short circuit to the electrode or wires.
What causes this fault?
This fault occurs when the boiler's control system cannot confirm that a flame has successfully ignited inside the burner. The most common reasons include a worn-out sensor that monitors the fire, a blockage in the gas supply, or an electrical issue preventing the ignition spark from triggering.
This fault can occasionally appear during the first cold snap of autumn when a boiler has been inactive all summer and the gas components have become slightly stuck or dusty.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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