Medium
F7 on Saunier Duval Themaclassic Plus F30E

Your boiler is struggling to accurately detect the temperature of your hot water, which means it may fail to provide hot water or heat it correctly.

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 fault

Engineer required

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

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Related fault codes

F8View →

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