High
2967 on Worcester Bosch Greenstar 8000 Life System

Your boiler has detected that water is heating up or cooling down at two different spots in a way that suggests a circulation problem or a faulty reading, so it has stopped working to prevent potential damage.

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

Flow/ heate exchanger temperature sensor differential too great

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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