High
284 on Worcester Bosch Greenstar i

Your boiler is failing to ignite the flame needed to produce heat or hot water because it isn't detecting a successful start-up.

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.

Technical description

Gas valve(s) opened, flame must be detected within safety time. The boiler prepares for a burner start. The gas valve is being controlled.

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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