Er06 High

Biasi Er06 Fault Code

Also written as ER06 — same fault.

The Biasi Er06 fault code means: your boiler has stopped working because it cannot correctly read the temperature of the water circulating through your heating system.. It appears on 3 Biasi models in our database.

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: C.h. flow/return temp. probe - check C.h. flow temp. probe NTC, C.h. return temp. probe NTC
Typical repair cost £120-220 (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 Er06 fault code

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

Source

Biasi Er06 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 7 July 2026