High
38 on Alpha Evoke

Your boiler briefly detected a flame but could not keep it lit, so it is automatically trying to restart itself.

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

Flame detected but signal lost. Ignition retries after fan purge

From this model's manual
Verified against the Alpha Evoke installation & service manual, page 48.
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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