How much does it cost to fix Biasi error code E01---205?

Typical repair cost for the Biasi E01---205 fault is £180-350 including labour.

E01---205 High

Biasi E01---205 Fault Code

Q: What does the Biasi E01---205 fault code mean?

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

Also written as E01205 — same fault.

The Biasi E01---205 fault code means: your boiler is failing to heat your tap water correctly because the internal heat exchanger is likely blocked or faulty.. It appears on 1 Biasi model in our database.

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

Typical repair cost £180-350 (including labour)

Engineer required

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

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Biasi models that show the E01---205 fault code

Click a model for the full fault code list and model-specific repair notes.

Riva Compact 24S Repair: £180-350

Source

Biasi E01---205 fault code information on this page is sourced and cross-checked against the official Biasi service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026