Medium
LD1, LD2 Flashing on Biasi Riva Compact 24S (M90E.24S)

Your boiler has detected a problem with the sensor that monitors hot water temperature, which means your taps may not get warm.

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.

What the manual says

Manufacturer manual

Faulty D.H.W. temperature probe NTC (SM models)

From this model's manual
Verified against the Riva Compact He C2 Service 2007 installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

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

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