BoilerFaultCodesBiasi E01---205 Fault Code
Also written as E01205 — same fault.
The Biasi E01---205 fault code means: your boiler is struggling to detect or regulate the flow of hot water, which usually means the system that transfers heat to your taps has become blocked or faulty.. It appears on 3 Biasi models in our database.
Technical description: D.h.w. heat exchanger (M96.28SM/...)
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.
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.
- Biasi Riva Compact 24S (M90E.24S) manual (PDF)
- Biasi Riva Compact HE M96a manual (PDF)
- Biasi Riva Compact HE MK2 manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026