High
FA 306 on Worcester Bosch 24 RSF

Your boiler thinks it still sees a flame even though the heating has been turned off.

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

False flame fault – flame detected after burner stop

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

FDView →EAView →F7View →

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