Medium
04E on Ravenheat Rsf

Your boiler is struggling to provide hot water correctly because its internal thermometer for the hot water system has stopped working.

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 (DHW) sensor damaged

Engineer required

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

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Related fault codes

02EView →21EView →

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