Medium
S.96 on Heatline Monza

Your boiler is struggling to accurately measure the temperature of the water returning to it, meaning it cannot properly regulate your heating or hot water.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

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

Return sensor control, DHW and CH is i

Engineer required

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

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Related fault codes

S.97View →

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