Emergency
FA on Worcester Bosch Greenstar CDi 27 CDi

Your boiler has detected that a flame is still burning even though it has tried to turn the gas supply off, which is a safety concern.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

What the manual says

Manufacturer manual

Flame detected after gas shut off, Check gas valve and wiring to gas valve, Clean condensation trap and check electrode assembly, Flue clear?

From this model's manual
Verified against the Worcester Bosch/Worcester Bosch Greenstar Cdi 2007 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 emergency 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

EAView →

All 8 fault codes on the Greenstar CDi 27 CDi

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

A7A9b1E2EAF7Fd

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