High
2910 on Worcester Bosch Greenstar 27CDi

Your boiler is having trouble breathing, meaning it cannot properly clear exhaust gases or draw in fresh air due to a possible blockage or a fan issue.

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

Error in the flue gas system. (Too much or too little resistance in air flow) • the fan speed is higher than expected due too missing exhaust. • the fan speed is to low due to an obstruction in the exhaust.

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

2971View →

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