Medium
A7 808 on Worcester Bosch Greenstar i

Your boiler is struggling to accurately detect the temperature of your hot water, which means it may fail to provide a consistent hot shower or turn the hot water off entirely.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

Domestic hot water sensor defect

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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