Medium
808 A7 on Worcester Bosch Greenstar CDi Compact

Your boiler is struggling to accurately measure the temperature of your hot water, which means it may fail to provide hot water to your taps or shower.

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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Related fault codes

A7View →

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