High
E01---205 on Biasi Riva Compact 24S

Your boiler is failing to heat your tap water correctly because the internal heat exchanger is likely blocked or faulty.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

D.h.w. heat exchanger (M96.28SM/...)

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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