Medium
E50 on Potterton Sirius FS

Your boiler is struggling to accurately detect your hot water temperature because one of its internal sensors has stopped sending a signal.

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

Hot water NTC sensor failure

Engineer required

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

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