High Lockout
LED 2 goes OFF on Ideal Mexico Super 40ff - 80ff

Your boiler is attempting to start and creating a spark, but it is failing to detect a flame and is shutting down for safety.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Ignition sequence: the spark starts and the gas valve opens.

What causes this fault?

This fault occurs when the boiler's control system fails to confirm that a flame has successfully lit after opening the gas valve. The most common reasons are a worn-out sensor that can no longer 'see' the flame, or a fault within the gas valve preventing fuel from reaching the burner. Over time, soot buildup or moisture can also interfere with the electrical signal required to keep the boiler running.

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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