Er High

Biasi Er Fault Code

Also written as ER — same fault.

The Biasi Er fault code means: your boiler has encountered a general safety error and has shut itself down to prevent damage, requiring you to attempt a reset before calling for professional help.. 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: Lock state signaled on the control panel electronic p.c.b. display
Typical repair cost £120-250 (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 Er fault code

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

Source

Biasi Er 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