High
Intermittent lockout on Worcester Bosch Greenstar 8000

Your boiler is struggling to stay lit reliably, causing it to shut down periodically for safety reasons.

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

Bad electrical connection; Intermittent flame detection fault; Down draught

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

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