High
2948 on Worcester Bosch Greenstar 8000 Life Regular

Your boiler is failing to ignite because it cannot maintain a stable flame at the lowest power setting.

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

No flame signal with low output | The burner starts automatically after cleaning. 1. If the fault occurs repeatedly: check the settings of the CO2 values.

From this model's manual
Verified against the Worcester Bosch Greenstar 8000 Life Regular installation & service manual, page 73.
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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