Medium
E28 on Biasi Basica Combi

Your boiler's hot water sensor has malfunctioned or developed a wiring fault, meaning the system can no longer monitor the temperature of your stored water.

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

Tank NTC probe failure.

Engineer required

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

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Related fault codes

E06View →

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