High Lockout
E83467 on Potterton Powermax HE

Your boiler is failing to create the spark needed to light the gas burner, meaning your heating and hot water will not work.

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

Spark Generator c/w Flying Lead

What causes this fault?

This fault occurs when the boiler's internal electronic system sends a command to start the fire, but the hardware fails to create the physical spark required. The most common reason is that the spark generator has burnt out or the ignition leads have worn down, preventing the electrical current from reaching the burner.

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.

Find a Gas Safe engineer
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