BoilerFaultCodesTechnical description
Pilot fails to light - No gas supply.
What causes this fault?
This fault occurs when the boiler attempts to start up but the small pilot flame fails to ignite or stay lit. The most common reasons include a blocked pilot burner caused by dust buildup, a worn-out sensor that can no longer detect the flame, or a fault within the gas valve preventing fuel from reaching the burner.
This issue is frequently seen after the boiler has been switched off all summer, as debris or air can settle in the pilot assembly during periods of inactivity.
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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