High
227 on Worcester Bosch Greenstar 8000 Life Combi

Your boiler is failing to light the gas even though it is trying to, which prevents your heating and hot water from working.

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

No flame signal after ignition

Shared across the Greenstar 8000 Life range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

What causes this fault?

This fault occurs when the boiler's internal control system cannot detect a flame after several attempts to light the gas. The most common reasons include a lack of gas supply to the unit, worn-out ignition parts that can no longer create a spark, or sensors that have become too dirty to 'see' the flame. It effectively means the boiler is entering a safety mode because it thinks it is unsafe to continue trying to ignite.

This fault is frequently seen during extreme cold snaps, as a frozen condensate pipe can back up into the boiler and prevent the burner from lighting.

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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Related fault codes

All 151 fault codes on the Greenstar 8000 Life Combi

Seeing a different code? Every code this model can display, in one place.

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