High
Ignition Lockout on Potterton Promax FSB 30HE

Your boiler has failed to start after several attempts because it cannot safely light its internal flame.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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.

What the manual says

Manufacturer manual

If a flame is not detected within 5 seconds and 5 ignition attempts have been made then ignition lockout occurs. The fan, spark generator and gas valve are off. The boiler can only be reset by manually using the reset button.

From this model's manual
Verified against the Potterton Promax Fsb 30he installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

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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